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Finding the Fourth Proportional to 479,721, 662,073.30 and 278,517

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Solution

The fourth proportional to 479,721, 662,073.30 and 278,517 is: 384,387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,721 : 662,073.30 = 278,517 : x
  2. Step 2: Convert to fraction form
    479,721/662,073.30 = 278,517/x
  3. Step 3: Cross multiply
    479,721x = 662,073.30 × 278,517
  4. Step 4: Simplify right side
    479,721x = 184,398,669,296.10
  5. Step 5: Solve for x
    x = 184,398,669,296.10/479,721
  6. Step 6: Final answer
    x = 384,387.32

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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.