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Finding the Fourth Proportional to 486,839.16, 671,838 and 271,979.28

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Solution

The fourth proportional to 486,839.16, 671,838 and 271,979.28 is: 375,331.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,839.16 : 671,838 = 271,979.28 : x
  2. Step 2: Convert to fraction form
    486,839.16/671,838 = 271,979.28/x
  3. Step 3: Cross multiply
    486,839.16x = 671,838 × 271,979.28
  4. Step 4: Simplify right side
    486,839.16x = 182,726,015,516.64
  5. Step 5: Solve for x
    x = 182,726,015,516.64/486,839.16
  6. Step 6: Final answer
    x = 375,331.38

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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.