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Finding the Fourth Proportional to 528,880.24, 729,781.28 and 311,098.80

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Solution

The fourth proportional to 528,880.24, 729,781.28 and 311,098.80 is: 429,273.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,880.24 : 729,781.28 = 311,098.80 : x
  2. Step 2: Convert to fraction form
    528,880.24/729,781.28 = 311,098.80/x
  3. Step 3: Cross multiply
    528,880.24x = 729,781.28 × 311,098.80
  4. Step 4: Simplify right side
    528,880.24x = 227,034,080,470.46
  5. Step 5: Solve for x
    x = 227,034,080,470.46/528,880.24
  6. Step 6: Final answer
    x = 429,273.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.