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Finding the Fourth Proportional to 663,443.68, 915,517.74 and 376,924

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Solution

The fourth proportional to 663,443.68, 915,517.74 and 376,924 is: 520,135.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,443.68 : 915,517.74 = 376,924 : x
  2. Step 2: Convert to fraction form
    663,443.68/915,517.74 = 376,924/x
  3. Step 3: Cross multiply
    663,443.68x = 915,517.74 × 376,924
  4. Step 4: Simplify right side
    663,443.68x = 345,080,608,631.76
  5. Step 5: Solve for x
    x = 345,080,608,631.76/663,443.68
  6. Step 6: Final answer
    x = 520,135.50

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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.