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Finding the Fourth Proportional to 667,390.52, 920,260.94 and 425,289.62

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Solution

The fourth proportional to 667,390.52, 920,260.94 and 425,289.62 is: 586,429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,390.52 : 920,260.94 = 425,289.62 : x
  2. Step 2: Convert to fraction form
    667,390.52/920,260.94 = 425,289.62/x
  3. Step 3: Cross multiply
    667,390.52x = 920,260.94 × 425,289.62
  4. Step 4: Simplify right side
    667,390.52x = 391,377,428,837.32
  5. Step 5: Solve for x
    x = 391,377,428,837.32/667,390.52
  6. Step 6: Final answer
    x = 586,429.41

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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.