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Finding the Fourth Proportional to 291,712.80, 437,569.20 and 272,029.80

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Solution

The fourth proportional to 291,712.80, 437,569.20 and 272,029.80 is: 408,044.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,712.80 : 437,569.20 = 272,029.80 : x
  2. Step 2: Convert to fraction form
    291,712.80/437,569.20 = 272,029.80/x
  3. Step 3: Cross multiply
    291,712.80x = 437,569.20 × 272,029.80
  4. Step 4: Simplify right side
    291,712.80x = 119,031,861,962.16
  5. Step 5: Solve for x
    x = 119,031,861,962.16/291,712.80
  6. Step 6: Final answer
    x = 408,044.70

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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.