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Finding the Fourth Proportional to 502,851.20, 754,276.80 and 390,876.80

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Solution

The fourth proportional to 502,851.20, 754,276.80 and 390,876.80 is: 586,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,851.20 : 754,276.80 = 390,876.80 : x
  2. Step 2: Convert to fraction form
    502,851.20/754,276.80 = 390,876.80/x
  3. Step 3: Cross multiply
    502,851.20x = 754,276.80 × 390,876.80
  4. Step 4: Simplify right side
    502,851.20x = 294,829,301,898.24
  5. Step 5: Solve for x
    x = 294,829,301,898.24/502,851.20
  6. Step 6: Final answer
    x = 586,315.20

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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.