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Finding the Fourth Proportional to 485,241.40, 727,862.10 and 317,279.80

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Solution

The fourth proportional to 485,241.40, 727,862.10 and 317,279.80 is: 475,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,241.40 : 727,862.10 = 317,279.80 : x
  2. Step 2: Convert to fraction form
    485,241.40/727,862.10 = 317,279.80/x
  3. Step 3: Cross multiply
    485,241.40x = 727,862.10 × 317,279.80
  4. Step 4: Simplify right side
    485,241.40x = 230,935,941,515.58
  5. Step 5: Solve for x
    x = 230,935,941,515.58/485,241.40
  6. Step 6: Final answer
    x = 475,919.70

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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.