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Finding the Fourth Proportional to 238,932, 358,398 and 72,720

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Solution

The fourth proportional to 238,932, 358,398 and 72,720 is: 109,080

Step by Step Solution

  1. Step 1: Write the proportion equation
    238,932 : 358,398 = 72,720 : x
  2. Step 2: Convert to fraction form
    238,932/358,398 = 72,720/x
  3. Step 3: Cross multiply
    238,932x = 358,398 × 72,720
  4. Step 4: Simplify right side
    238,932x = 26,062,702,560
  5. Step 5: Solve for x
    x = 26,062,702,560/238,932
  6. Step 6: Final answer
    x = 109,080

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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.