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Finding the Fourth Proportional to 667,317.72, 920,637.18 and 425,535.96

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Solution

The fourth proportional to 667,317.72, 920,637.18 and 425,535.96 is: 587,073.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,317.72 : 920,637.18 = 425,535.96 : x
  2. Step 2: Convert to fraction form
    667,317.72/920,637.18 = 425,535.96/x
  3. Step 3: Cross multiply
    667,317.72x = 920,637.18 × 425,535.96
  4. Step 4: Simplify right side
    667,317.72x = 391,764,226,202.99
  5. Step 5: Solve for x
    x = 391,764,226,202.99/667,317.72
  6. Step 6: Final answer
    x = 587,073.02

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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.