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Finding the Fourth Proportional to 641,997.12, 963,141.60 and 342,319.68

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Solution

The fourth proportional to 641,997.12, 963,141.60 and 342,319.68 is: 513,557.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,997.12 : 963,141.60 = 342,319.68 : x
  2. Step 2: Convert to fraction form
    641,997.12/963,141.60 = 342,319.68/x
  3. Step 3: Cross multiply
    641,997.12x = 963,141.60 × 342,319.68
  4. Step 4: Simplify right side
    641,997.12x = 329,702,324,306.69
  5. Step 5: Solve for x
    x = 329,702,324,306.69/641,997.12
  6. Step 6: Final answer
    x = 513,557.33

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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.