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Finding the Fourth Proportional to 260,691.54, 391,185.12 and 140,746.88

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Solution

The fourth proportional to 260,691.54, 391,185.12 and 140,746.88 is: 211,200.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,691.54 : 391,185.12 = 140,746.88 : x
  2. Step 2: Convert to fraction form
    260,691.54/391,185.12 = 140,746.88/x
  3. Step 3: Cross multiply
    260,691.54x = 391,185.12 × 140,746.88
  4. Step 4: Simplify right side
    260,691.54x = 55,058,085,142.43
  5. Step 5: Solve for x
    x = 55,058,085,142.43/260,691.54
  6. Step 6: Final answer
    x = 211,200.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.