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Finding the Fourth Proportional to 291,640.90, 437,221.35 and 131,727.30

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Solution

The fourth proportional to 291,640.90, 437,221.35 and 131,727.30 is: 197,482.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,640.90 : 437,221.35 = 131,727.30 : x
  2. Step 2: Convert to fraction form
    291,640.90/437,221.35 = 131,727.30/x
  3. Step 3: Cross multiply
    291,640.90x = 437,221.35 × 131,727.30
  4. Step 4: Simplify right side
    291,640.90x = 57,593,987,937.86
  5. Step 5: Solve for x
    x = 57,593,987,937.86/291,640.90
  6. Step 6: Final answer
    x = 197,482.55

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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.