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Finding the Fourth Proportional to 687,444.78, 948,684.03 and 381,540.88

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Solution

The fourth proportional to 687,444.78, 948,684.03 and 381,540.88 is: 526,532.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,444.78 : 948,684.03 = 381,540.88 : x
  2. Step 2: Convert to fraction form
    687,444.78/948,684.03 = 381,540.88/x
  3. Step 3: Cross multiply
    687,444.78x = 948,684.03 × 381,540.88
  4. Step 4: Simplify right side
    687,444.78x = 361,961,739,648.15
  5. Step 5: Solve for x
    x = 361,961,739,648.15/687,444.78
  6. Step 6: Final answer
    x = 526,532.09

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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.