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Finding the Fourth Proportional to 486,874.10, 671,873.85 and 272,015.78

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Solution

The fourth proportional to 486,874.10, 671,873.85 and 272,015.78 is: 375,374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,874.10 : 671,873.85 = 272,015.78 : x
  2. Step 2: Convert to fraction form
    486,874.10/671,873.85 = 272,015.78/x
  3. Step 3: Cross multiply
    486,874.10x = 671,873.85 × 272,015.78
  4. Step 4: Simplify right side
    486,874.10x = 182,760,286,009.98
  5. Step 5: Solve for x
    x = 182,760,286,009.98/486,874.10
  6. Step 6: Final answer
    x = 375,374.84

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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.