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Finding the Fourth Proportional to 342,391.88, 513,487.24 and 129,005.76

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Solution

The fourth proportional to 342,391.88, 513,487.24 and 129,005.76 is: 193,470.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,391.88 : 513,487.24 = 129,005.76 : x
  2. Step 2: Convert to fraction form
    342,391.88/513,487.24 = 129,005.76/x
  3. Step 3: Cross multiply
    342,391.88x = 513,487.24 × 129,005.76
  4. Step 4: Simplify right side
    342,391.88x = 66,242,811,646.50
  5. Step 5: Solve for x
    x = 66,242,811,646.50/342,391.88
  6. Step 6: Final answer
    x = 193,470.74

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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.