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Finding the Fourth Proportional to 318,638.70, 439,721.28 and 175,398

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Solution

The fourth proportional to 318,638.70, 439,721.28 and 175,398 is: 242,049.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,638.70 : 439,721.28 = 175,398 : x
  2. Step 2: Convert to fraction form
    318,638.70/439,721.28 = 175,398/x
  3. Step 3: Cross multiply
    318,638.70x = 439,721.28 × 175,398
  4. Step 4: Simplify right side
    318,638.70x = 77,126,233,069.44
  5. Step 5: Solve for x
    x = 77,126,233,069.44/318,638.70
  6. Step 6: Final answer
    x = 242,049.17

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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.