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Finding the Fourth Proportional to 486,876.10, 671,876.61 and 272,017.78

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Solution

The fourth proportional to 486,876.10, 671,876.61 and 272,017.78 is: 375,377.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,876.10 : 671,876.61 = 272,017.78 : x
  2. Step 2: Convert to fraction form
    486,876.10/671,876.61 = 272,017.78/x
  3. Step 3: Cross multiply
    486,876.10x = 671,876.61 × 272,017.78
  4. Step 4: Simplify right side
    486,876.10x = 182,762,383,886.13
  5. Step 5: Solve for x
    x = 182,762,383,886.13/486,876.10
  6. Step 6: Final answer
    x = 375,377.60

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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.