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Finding the Fourth Proportional to 291,463.52, 437,212.80 and 91,790.40

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Solution

The fourth proportional to 291,463.52, 437,212.80 and 91,790.40 is: 137,691.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,463.52 : 437,212.80 = 91,790.40 : x
  2. Step 2: Convert to fraction form
    291,463.52/437,212.80 = 91,790.40/x
  3. Step 3: Cross multiply
    291,463.52x = 437,212.80 × 91,790.40
  4. Step 4: Simplify right side
    291,463.52x = 40,131,937,797.12
  5. Step 5: Solve for x
    x = 40,131,937,797.12/291,463.52
  6. Step 6: Final answer
    x = 137,691.12

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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.