Home / 687,047.34-948,131.04-381,143.73

Finding the Fourth Proportional to 687,047.34, 948,131.04 and 381,143.73

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Solution

The fourth proportional to 687,047.34, 948,131.04 and 381,143.73 is: 525,981.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,047.34 : 948,131.04 = 381,143.73 : x
  2. Step 2: Convert to fraction form
    687,047.34/948,131.04 = 381,143.73/x
  3. Step 3: Cross multiply
    687,047.34x = 948,131.04 × 381,143.73
  4. Step 4: Simplify right side
    687,047.34x = 361,374,201,114.38
  5. Step 5: Solve for x
    x = 361,374,201,114.38/687,047.34
  6. Step 6: Final answer
    x = 525,981.52

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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.