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Finding the Fourth Proportional to 663,709.79, 915,998.13 and 377,272.91

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Solution

The fourth proportional to 663,709.79, 915,998.13 and 377,272.91 is: 520,681.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,709.79 : 915,998.13 = 377,272.91 : x
  2. Step 2: Convert to fraction form
    663,709.79/915,998.13 = 377,272.91/x
  3. Step 3: Cross multiply
    663,709.79x = 915,998.13 × 377,272.91
  4. Step 4: Simplify right side
    663,709.79x = 345,581,275,479.67
  5. Step 5: Solve for x
    x = 345,581,275,479.67/663,709.79
  6. Step 6: Final answer
    x = 520,681.30

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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.