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Finding the Fourth Proportional to 291,397.50, 437,113.80 and 91,724.40

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Solution

The fourth proportional to 291,397.50, 437,113.80 and 91,724.40 is: 137,592.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,397.50 : 437,113.80 = 91,724.40 : x
  2. Step 2: Convert to fraction form
    291,397.50/437,113.80 = 91,724.40/x
  3. Step 3: Cross multiply
    291,397.50x = 437,113.80 × 91,724.40
  4. Step 4: Simplify right side
    291,397.50x = 40,094,001,036.72
  5. Step 5: Solve for x
    x = 40,094,001,036.72/291,397.50
  6. Step 6: Final answer
    x = 137,592.12

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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.