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Finding the Fourth Proportional to 638,143.20, 958,640.40 and 533,167.20

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Solution

The fourth proportional to 638,143.20, 958,640.40 and 533,167.20 is: 800,941.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,143.20 : 958,640.40 = 533,167.20 : x
  2. Step 2: Convert to fraction form
    638,143.20/958,640.40 = 533,167.20/x
  3. Step 3: Cross multiply
    638,143.20x = 958,640.40 × 533,167.20
  4. Step 4: Simplify right side
    638,143.20x = 511,115,617,874.88
  5. Step 5: Solve for x
    x = 511,115,617,874.88/638,143.20
  6. Step 6: Final answer
    x = 800,941.89

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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.