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Finding the Fourth Proportional to 355,209.90, 532,790.55 and 115,320.30

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Solution

The fourth proportional to 355,209.90, 532,790.55 and 115,320.30 is: 172,972.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,209.90 : 532,790.55 = 115,320.30 : x
  2. Step 2: Convert to fraction form
    355,209.90/532,790.55 = 115,320.30/x
  3. Step 3: Cross multiply
    355,209.90x = 532,790.55 × 115,320.30
  4. Step 4: Simplify right side
    355,209.90x = 61,441,566,063.17
  5. Step 5: Solve for x
    x = 61,441,566,063.17/355,209.90
  6. Step 6: Final answer
    x = 172,972.56

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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.