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Finding the Fourth Proportional to 287,062.85, 396,217.05 and 222,404.20

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Solution

The fourth proportional to 287,062.85, 396,217.05 and 222,404.20 is: 306,972.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,062.85 : 396,217.05 = 222,404.20 : x
  2. Step 2: Convert to fraction form
    287,062.85/396,217.05 = 222,404.20/x
  3. Step 3: Cross multiply
    287,062.85x = 396,217.05 × 222,404.20
  4. Step 4: Simplify right side
    287,062.85x = 88,120,334,050.52
  5. Step 5: Solve for x
    x = 88,120,334,050.52/287,062.85
  6. Step 6: Final answer
    x = 306,972.27

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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.