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Finding the Fourth Proportional to 870,755, 1,306,132.50 and 309,791.12

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Solution

The fourth proportional to 870,755, 1,306,132.50 and 309,791.12 is: 464,686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,755 : 1,306,132.50 = 309,791.12 : x
  2. Step 2: Convert to fraction form
    870,755/1,306,132.50 = 309,791.12/x
  3. Step 3: Cross multiply
    870,755x = 1,306,132.50 × 309,791.12
  4. Step 4: Simplify right side
    870,755x = 404,628,250,043.40
  5. Step 5: Solve for x
    x = 404,628,250,043.40/870,755
  6. Step 6: Final answer
    x = 464,686.68

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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.