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Finding the Fourth Proportional to 511,910.14, 706,691.75 and 318,380.23

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Solution

The fourth proportional to 511,910.14, 706,691.75 and 318,380.23 is: 439,523.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,910.14 : 706,691.75 = 318,380.23 : x
  2. Step 2: Convert to fraction form
    511,910.14/706,691.75 = 318,380.23/x
  3. Step 3: Cross multiply
    511,910.14x = 706,691.75 × 318,380.23
  4. Step 4: Simplify right side
    511,910.14x = 224,996,681,904.10
  5. Step 5: Solve for x
    x = 224,996,681,904.10/511,910.14
  6. Step 6: Final answer
    x = 439,523.78

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1.5x scale

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.