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Finding the Fourth Proportional to 291,398.50, 437,115.30 and 91,725.40

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Solution

The fourth proportional to 291,398.50, 437,115.30 and 91,725.40 is: 137,593.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,398.50 : 437,115.30 = 91,725.40 : x
  2. Step 2: Convert to fraction form
    291,398.50/437,115.30 = 91,725.40/x
  3. Step 3: Cross multiply
    291,398.50x = 437,115.30 × 91,725.40
  4. Step 4: Simplify right side
    291,398.50x = 40,094,575,738.62
  5. Step 5: Solve for x
    x = 40,094,575,738.62/291,398.50
  6. Step 6: Final answer
    x = 137,593.62

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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.