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Finding the Fourth Proportional to 342,605.84, 513,613.44 and 132,391.28

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Solution

The fourth proportional to 342,605.84, 513,613.44 and 132,391.28 is: 198,472.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,605.84 : 513,613.44 = 132,391.28 : x
  2. Step 2: Convert to fraction form
    342,605.84/513,613.44 = 132,391.28/x
  3. Step 3: Cross multiply
    342,605.84x = 513,613.44 × 132,391.28
  4. Step 4: Simplify right side
    342,605.84x = 67,997,940,746.80
  5. Step 5: Solve for x
    x = 67,997,940,746.80/342,605.84
  6. Step 6: Final answer
    x = 198,472.80

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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.