Home / 919,340.78-1,379,011.17-288,303.80

Finding the Fourth Proportional to 919,340.78, 1,379,011.17 and 288,303.80

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Solution

The fourth proportional to 919,340.78, 1,379,011.17 and 288,303.80 is: 432,455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,340.78 : 1,379,011.17 = 288,303.80 : x
  2. Step 2: Convert to fraction form
    919,340.78/1,379,011.17 = 288,303.80/x
  3. Step 3: Cross multiply
    919,340.78x = 1,379,011.17 × 288,303.80
  4. Step 4: Simplify right side
    919,340.78x = 397,574,160,553.45
  5. Step 5: Solve for x
    x = 397,574,160,553.45/919,340.78
  6. Step 6: Final answer
    x = 432,455.70

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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.