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Finding the Fourth Proportional to 402,197.60, 555,037.21 and 220,913.73

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Solution

The fourth proportional to 402,197.60, 555,037.21 and 220,913.73 is: 304,863.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,197.60 : 555,037.21 = 220,913.73 : x
  2. Step 2: Convert to fraction form
    402,197.60/555,037.21 = 220,913.73/x
  3. Step 3: Cross multiply
    402,197.60x = 555,037.21 × 220,913.73
  4. Step 4: Simplify right side
    402,197.60x = 122,615,340,626.04
  5. Step 5: Solve for x
    x = 122,615,340,626.04/402,197.60
  6. Step 6: Final answer
    x = 304,863.43

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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.