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Finding the Fourth Proportional to 667,391.52, 920,262.32 and 425,290.62

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Solution

The fourth proportional to 667,391.52, 920,262.32 and 425,290.62 is: 586,430.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,391.52 : 920,262.32 = 425,290.62 : x
  2. Step 2: Convert to fraction form
    667,391.52/920,262.32 = 425,290.62/x
  3. Step 3: Cross multiply
    667,391.52x = 920,262.32 × 425,290.62
  4. Step 4: Simplify right side
    667,391.52x = 391,378,932,635.44
  5. Step 5: Solve for x
    x = 391,378,932,635.44/667,391.52
  6. Step 6: Final answer
    x = 586,430.78

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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.