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Finding the Fourth Proportional to 667,118, 920,765.76 and 425,344.88

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Solution

The fourth proportional to 667,118, 920,765.76 and 425,344.88 is: 587,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,118 : 920,765.76 = 425,344.88 : x
  2. Step 2: Convert to fraction form
    667,118/920,765.76 = 425,344.88/x
  3. Step 3: Cross multiply
    667,118x = 920,765.76 × 425,344.88
  4. Step 4: Simplify right side
    667,118x = 391,643,001,695.31
  5. Step 5: Solve for x
    x = 391,643,001,695.31/667,118
  6. Step 6: Final answer
    x = 587,067.06

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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.