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Finding the Fourth Proportional to 667,808.43, 999,318.17 and 578,159.49

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Solution

The fourth proportional to 667,808.43, 999,318.17 and 578,159.49 is: 865,166.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,808.43 : 999,318.17 = 578,159.49 : x
  2. Step 2: Convert to fraction form
    667,808.43/999,318.17 = 578,159.49/x
  3. Step 3: Cross multiply
    667,808.43x = 999,318.17 × 578,159.49
  4. Step 4: Simplify right side
    667,808.43x = 577,765,275,627.55
  5. Step 5: Solve for x
    x = 577,765,275,627.55/667,808.43
  6. Step 6: Final answer
    x = 865,166.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.