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Finding the Fourth Proportional to 291,221.08, 436,831.10 and 91,558.88

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Solution

The fourth proportional to 291,221.08, 436,831.10 and 91,558.88 is: 137,338.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,221.08 : 436,831.10 = 91,558.88 : x
  2. Step 2: Convert to fraction form
    291,221.08/436,831.10 = 91,558.88/x
  3. Step 3: Cross multiply
    291,221.08x = 436,831.10 × 91,558.88
  4. Step 4: Simplify right side
    291,221.08x = 39,995,766,265.17
  5. Step 5: Solve for x
    x = 39,995,766,265.17/291,221.08
  6. Step 6: Final answer
    x = 137,338.16

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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.