Home / 813,388.40-1,122,517.36-469,096.32

Finding the Fourth Proportional to 813,388.40, 1,122,517.36 and 469,096.32

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Solution

The fourth proportional to 813,388.40, 1,122,517.36 and 469,096.32 is: 647,376.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,388.40 : 1,122,517.36 = 469,096.32 : x
  2. Step 2: Convert to fraction form
    813,388.40/1,122,517.36 = 469,096.32/x
  3. Step 3: Cross multiply
    813,388.40x = 1,122,517.36 × 469,096.32
  4. Step 4: Simplify right side
    813,388.40x = 526,568,762,712.12
  5. Step 5: Solve for x
    x = 526,568,762,712.12/813,388.40
  6. Step 6: Final answer
    x = 647,376.78

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.