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Finding the Fourth Proportional to 667,501.44, 921,156.45 and 361,577.84

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Solution

The fourth proportional to 667,501.44, 921,156.45 and 361,577.84 is: 498,979.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,501.44 : 921,156.45 = 361,577.84 : x
  2. Step 2: Convert to fraction form
    667,501.44/921,156.45 = 361,577.84/x
  3. Step 3: Cross multiply
    667,501.44x = 921,156.45 × 361,577.84
  4. Step 4: Simplify right side
    667,501.44x = 333,069,757,685.18
  5. Step 5: Solve for x
    x = 333,069,757,685.18/667,501.44
  6. Step 6: Final answer
    x = 498,979.83

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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.