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Finding the Fourth Proportional to 487,374.80, 731,062.20 and 369,276.80

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Solution

The fourth proportional to 487,374.80, 731,062.20 and 369,276.80 is: 553,915.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,374.80 : 731,062.20 = 369,276.80 : x
  2. Step 2: Convert to fraction form
    487,374.80/731,062.20 = 369,276.80/x
  3. Step 3: Cross multiply
    487,374.80x = 731,062.20 × 369,276.80
  4. Step 4: Simplify right side
    487,374.80x = 269,964,309,816.96
  5. Step 5: Solve for x
    x = 269,964,309,816.96/487,374.80
  6. Step 6: Final answer
    x = 553,915.20

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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.