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Finding the Fourth Proportional to 641,126.80, 961,690.20 and 267,101.20

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Solution

The fourth proportional to 641,126.80, 961,690.20 and 267,101.20 is: 400,651.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,126.80 : 961,690.20 = 267,101.20 : x
  2. Step 2: Convert to fraction form
    641,126.80/961,690.20 = 267,101.20/x
  3. Step 3: Cross multiply
    641,126.80x = 961,690.20 × 267,101.20
  4. Step 4: Simplify right side
    641,126.80x = 256,868,606,448.24
  5. Step 5: Solve for x
    x = 256,868,606,448.24/641,126.80
  6. Step 6: Final answer
    x = 400,651.80

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Double scale
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Similar ratio
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1.5x scale

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.