Home / 674,015.40-1,010,331.90-393,388.20

Finding the Fourth Proportional to 674,015.40, 1,010,331.90 and 393,388.20

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Solution

The fourth proportional to 674,015.40, 1,010,331.90 and 393,388.20 is: 589,678.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,015.40 : 1,010,331.90 = 393,388.20 : x
  2. Step 2: Convert to fraction form
    674,015.40/1,010,331.90 = 393,388.20/x
  3. Step 3: Cross multiply
    674,015.40x = 1,010,331.90 × 393,388.20
  4. Step 4: Simplify right side
    674,015.40x = 397,452,647,543.58
  5. Step 5: Solve for x
    x = 397,452,647,543.58/674,015.40
  6. Step 6: Final answer
    x = 589,678.88

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Double scale
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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.