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Finding the Fourth Proportional to 486,876.60, 671,877.30 and 272,018.28

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Solution

The fourth proportional to 486,876.60, 671,877.30 and 272,018.28 is: 375,378.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,876.60 : 671,877.30 = 272,018.28 : x
  2. Step 2: Convert to fraction form
    486,876.60/671,877.30 = 272,018.28/x
  3. Step 3: Cross multiply
    486,876.60x = 671,877.30 × 272,018.28
  4. Step 4: Simplify right side
    486,876.60x = 182,762,907,517.04
  5. Step 5: Solve for x
    x = 182,762,907,517.04/486,876.60
  6. Step 6: Final answer
    x = 375,378.29

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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.