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Finding the Fourth Proportional to 386,121.61, 532,531.88 and 271,778.77

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Solution

The fourth proportional to 386,121.61, 532,531.88 and 271,778.77 is: 374,832.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,121.61 : 532,531.88 = 271,778.77 : x
  2. Step 2: Convert to fraction form
    386,121.61/532,531.88 = 271,778.77/x
  3. Step 3: Cross multiply
    386,121.61x = 532,531.88 × 271,778.77
  4. Step 4: Simplify right side
    386,121.61x = 144,730,858,680.31
  5. Step 5: Solve for x
    x = 144,730,858,680.31/386,121.61
  6. Step 6: Final answer
    x = 374,832.32

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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.