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Finding the Fourth Proportional to 318,691.80, 439,797.60 and 175,455

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Solution

The fourth proportional to 318,691.80, 439,797.60 and 175,455 is: 242,129.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,691.80 : 439,797.60 = 175,455 : x
  2. Step 2: Convert to fraction form
    318,691.80/439,797.60 = 175,455/x
  3. Step 3: Cross multiply
    318,691.80x = 439,797.60 × 175,455
  4. Step 4: Simplify right side
    318,691.80x = 77,164,687,908
  5. Step 5: Solve for x
    x = 77,164,687,908/318,691.80
  6. Step 6: Final answer
    x = 242,129.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.