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Finding the Fourth Proportional to 945,660.80, 1,418,491.20 and 472,419.20

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Solution

The fourth proportional to 945,660.80, 1,418,491.20 and 472,419.20 is: 708,628.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    945,660.80 : 1,418,491.20 = 472,419.20 : x
  2. Step 2: Convert to fraction form
    945,660.80/1,418,491.20 = 472,419.20/x
  3. Step 3: Cross multiply
    945,660.80x = 1,418,491.20 × 472,419.20
  4. Step 4: Simplify right side
    945,660.80x = 670,122,477,911.04
  5. Step 5: Solve for x
    x = 670,122,477,911.04/945,660.80
  6. Step 6: Final answer
    x = 708,628.80

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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.