Home / 905,420,821.80-1,358,131,232.70-642,392,956.20

Finding the Fourth Proportional to 905,420,821.80, 1,358,131,232.70 and 642,392,956.20

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Solution

The fourth proportional to 905,420,821.80, 1,358,131,232.70 and 642,392,956.20 is: 963,589,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,420,821.80 : 1,358,131,232.70 = 642,392,956.20 : x
  2. Step 2: Convert to fraction form
    905,420,821.80/1,358,131,232.70 = 642,392,956.20/x
  3. Step 3: Cross multiply
    905,420,821.80x = 1,358,131,232.70 × 642,392,956.20
  4. Step 4: Simplify right side
    905,420,821.80x = 872,453,937,481,703,168
  5. Step 5: Solve for x
    x = 872,453,937,481,703,168/905,420,821.80
  6. Step 6: Final answer
    x = 963,589,434.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.