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Finding the Fourth Proportional to 485,640.53, 728,045.43 and 186,335.91

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Solution

The fourth proportional to 485,640.53, 728,045.43 and 186,335.91 is: 279,344.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,640.53 : 728,045.43 = 186,335.91 : x
  2. Step 2: Convert to fraction form
    485,640.53/728,045.43 = 186,335.91/x
  3. Step 3: Cross multiply
    485,640.53x = 728,045.43 × 186,335.91
  4. Step 4: Simplify right side
    485,640.53x = 135,661,006,788.71
  5. Step 5: Solve for x
    x = 135,661,006,788.71/485,640.53
  6. Step 6: Final answer
    x = 279,344.49

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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.