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Finding the Fourth Proportional to 393,217.44, 587,159.08 and 312,347.64

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Solution

The fourth proportional to 393,217.44, 587,159.08 and 312,347.64 is: 466,402.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,217.44 : 587,159.08 = 312,347.64 : x
  2. Step 2: Convert to fraction form
    393,217.44/587,159.08 = 312,347.64/x
  3. Step 3: Cross multiply
    393,217.44x = 587,159.08 × 312,347.64
  4. Step 4: Simplify right side
    393,217.44x = 183,397,754,363.55
  5. Step 5: Solve for x
    x = 183,397,754,363.55/393,217.44
  6. Step 6: Final answer
    x = 466,402.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.