Home / 687,012.33-948,092.22-381,078.75

Finding the Fourth Proportional to 687,012.33, 948,092.22 and 381,078.75

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Solution

The fourth proportional to 687,012.33, 948,092.22 and 381,078.75 is: 525,897.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,012.33 : 948,092.22 = 381,078.75 : x
  2. Step 2: Convert to fraction form
    687,012.33/948,092.22 = 381,078.75/x
  3. Step 3: Cross multiply
    687,012.33x = 948,092.22 × 381,078.75
  4. Step 4: Simplify right side
    687,012.33x = 361,297,797,899.38
  5. Step 5: Solve for x
    x = 361,297,797,899.38/687,012.33
  6. Step 6: Final answer
    x = 525,897.11

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.