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Finding the Fourth Proportional to 442,883.30, 664,422.15 and 143,312.90

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Solution

The fourth proportional to 442,883.30, 664,422.15 and 143,312.90 is: 215,000.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,883.30 : 664,422.15 = 143,312.90 : x
  2. Step 2: Convert to fraction form
    442,883.30/664,422.15 = 143,312.90/x
  3. Step 3: Cross multiply
    442,883.30x = 664,422.15 × 143,312.90
  4. Step 4: Simplify right side
    442,883.30x = 95,220,265,140.74
  5. Step 5: Solve for x
    x = 95,220,265,140.74/442,883.30
  6. Step 6: Final answer
    x = 215,000.80

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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.