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Finding the Fourth Proportional to 291,470.13, 437,220.87 and 91,806.15

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Solution

The fourth proportional to 291,470.13, 437,220.87 and 91,806.15 is: 137,714.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,470.13 : 437,220.87 = 91,806.15 : x
  2. Step 2: Convert to fraction form
    291,470.13/437,220.87 = 91,806.15/x
  3. Step 3: Cross multiply
    291,470.13x = 437,220.87 × 91,806.15
  4. Step 4: Simplify right side
    291,470.13x = 40,139,564,774.35
  5. Step 5: Solve for x
    x = 40,139,564,774.35/291,470.13
  6. Step 6: Final answer
    x = 137,714.16

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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.