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Finding the Fourth Proportional to 257,432.80, 386,149.20 and 222,003.40

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Solution

The fourth proportional to 257,432.80, 386,149.20 and 222,003.40 is: 333,005.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,432.80 : 386,149.20 = 222,003.40 : x
  2. Step 2: Convert to fraction form
    257,432.80/386,149.20 = 222,003.40/x
  3. Step 3: Cross multiply
    257,432.80x = 386,149.20 × 222,003.40
  4. Step 4: Simplify right side
    257,432.80x = 85,726,435,307.28
  5. Step 5: Solve for x
    x = 85,726,435,307.28/257,432.80
  6. Step 6: Final answer
    x = 333,005.10

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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.