Home / 672,082.20-1,008,123.30-388,258.20

Finding the Fourth Proportional to 672,082.20, 1,008,123.30 and 388,258.20

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Solution

The fourth proportional to 672,082.20, 1,008,123.30 and 388,258.20 is: 582,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,082.20 : 1,008,123.30 = 388,258.20 : x
  2. Step 2: Convert to fraction form
    672,082.20/1,008,123.30 = 388,258.20/x
  3. Step 3: Cross multiply
    672,082.20x = 1,008,123.30 × 388,258.20
  4. Step 4: Simplify right side
    672,082.20x = 391,412,137,836.06
  5. Step 5: Solve for x
    x = 391,412,137,836.06/672,082.20
  6. Step 6: Final answer
    x = 582,387.30

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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.