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Finding the Fourth Proportional to 355,003.20, 532,504.80 and 261,691.20

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Solution

The fourth proportional to 355,003.20, 532,504.80 and 261,691.20 is: 392,536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,003.20 : 532,504.80 = 261,691.20 : x
  2. Step 2: Convert to fraction form
    355,003.20/532,504.80 = 261,691.20/x
  3. Step 3: Cross multiply
    355,003.20x = 532,504.80 × 261,691.20
  4. Step 4: Simplify right side
    355,003.20x = 139,351,820,117.76
  5. Step 5: Solve for x
    x = 139,351,820,117.76/355,003.20
  6. Step 6: Final answer
    x = 392,536.80

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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.