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Finding the Fourth Proportional to 318,395.72, 439,084.53 and 203,710.66

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Solution

The fourth proportional to 318,395.72, 439,084.53 and 203,710.66 is: 280,927.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,395.72 : 439,084.53 = 203,710.66 : x
  2. Step 2: Convert to fraction form
    318,395.72/439,084.53 = 203,710.66/x
  3. Step 3: Cross multiply
    318,395.72x = 439,084.53 × 203,710.66
  4. Step 4: Simplify right side
    318,395.72x = 89,446,198,304.38
  5. Step 5: Solve for x
    x = 89,446,198,304.38/318,395.72
  6. Step 6: Final answer
    x = 280,927.76

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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.