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Finding the Fourth Proportional to 347,414.40, 521,121.60 and 342,165.60

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Solution

The fourth proportional to 347,414.40, 521,121.60 and 342,165.60 is: 513,248.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,414.40 : 521,121.60 = 342,165.60 : x
  2. Step 2: Convert to fraction form
    347,414.40/521,121.60 = 342,165.60/x
  3. Step 3: Cross multiply
    347,414.40x = 521,121.60 × 342,165.60
  4. Step 4: Simplify right side
    347,414.40x = 178,309,884,936.96
  5. Step 5: Solve for x
    x = 178,309,884,936.96/347,414.40
  6. Step 6: Final answer
    x = 513,248.40

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1.5x scale

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.