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Finding the Fourth Proportional to 318,490.54, 439,503.75 and 173,296.91

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Solution

The fourth proportional to 318,490.54, 439,503.75 and 173,296.91 is: 239,142.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,490.54 : 439,503.75 = 173,296.91 : x
  2. Step 2: Convert to fraction form
    318,490.54/439,503.75 = 173,296.91/x
  3. Step 3: Cross multiply
    318,490.54x = 439,503.75 × 173,296.91
  4. Step 4: Simplify right side
    318,490.54x = 76,164,642,907.17
  5. Step 5: Solve for x
    x = 76,164,642,907.17/318,490.54
  6. Step 6: Final answer
    x = 239,142.56

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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.