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Finding the Fourth Proportional to 268,205.70, 402,308.55 and 143,789.70

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Solution

The fourth proportional to 268,205.70, 402,308.55 and 143,789.70 is: 215,684.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,205.70 : 402,308.55 = 143,789.70 : x
  2. Step 2: Convert to fraction form
    268,205.70/402,308.55 = 143,789.70/x
  3. Step 3: Cross multiply
    268,205.70x = 402,308.55 × 143,789.70
  4. Step 4: Simplify right side
    268,205.70x = 57,847,825,711.94
  5. Step 5: Solve for x
    x = 57,847,825,711.94/268,205.70
  6. Step 6: Final answer
    x = 215,684.55

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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.