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Finding the Fourth Proportional to 687,513.54, 948,761.48 and 381,592.56

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Solution

The fourth proportional to 687,513.54, 948,761.48 and 381,592.56 is: 526,593.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,513.54 : 948,761.48 = 381,592.56 : x
  2. Step 2: Convert to fraction form
    687,513.54/948,761.48 = 381,592.56/x
  3. Step 3: Cross multiply
    687,513.54x = 948,761.48 × 381,592.56
  4. Step 4: Simplify right side
    687,513.54x = 362,040,321,982.59
  5. Step 5: Solve for x
    x = 362,040,321,982.59/687,513.54
  6. Step 6: Final answer
    x = 526,593.73

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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.