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Finding the Fourth Proportional to 415,680.20, 623,520.30 and 149,449.40

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Solution

The fourth proportional to 415,680.20, 623,520.30 and 149,449.40 is: 224,174.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,680.20 : 623,520.30 = 149,449.40 : x
  2. Step 2: Convert to fraction form
    415,680.20/623,520.30 = 149,449.40/x
  3. Step 3: Cross multiply
    415,680.20x = 623,520.30 × 149,449.40
  4. Step 4: Simplify right side
    415,680.20x = 93,184,734,722.82
  5. Step 5: Solve for x
    x = 93,184,734,722.82/415,680.20
  6. Step 6: Final answer
    x = 224,174.10

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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.