Home / 815,013.47-1,222,520.13-309,573.20

Finding the Fourth Proportional to 815,013.47, 1,222,520.13 and 309,573.20

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Solution

The fourth proportional to 815,013.47, 1,222,520.13 and 309,573.20 is: 464,359.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,013.47 : 1,222,520.13 = 309,573.20 : x
  2. Step 2: Convert to fraction form
    815,013.47/1,222,520.13 = 309,573.20/x
  3. Step 3: Cross multiply
    815,013.47x = 1,222,520.13 × 309,573.20
  4. Step 4: Simplify right side
    815,013.47x = 378,459,468,708.52
  5. Step 5: Solve for x
    x = 378,459,468,708.52/815,013.47
  6. Step 6: Final answer
    x = 464,359.77

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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.