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Finding the Fourth Proportional to 399,179.70, 598,639.95 and 132,894.90

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Solution

The fourth proportional to 399,179.70, 598,639.95 and 132,894.90 is: 199,299.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,179.70 : 598,639.95 = 132,894.90 : x
  2. Step 2: Convert to fraction form
    399,179.70/598,639.95 = 132,894.90/x
  3. Step 3: Cross multiply
    399,179.70x = 598,639.95 × 132,894.90
  4. Step 4: Simplify right side
    399,179.70x = 79,556,196,291.26
  5. Step 5: Solve for x
    x = 79,556,196,291.26/399,179.70
  6. Step 6: Final answer
    x = 199,299.20

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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.