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Finding the Fourth Proportional to 306,357.32, 422,765.71 and 170,390.85

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Solution

The fourth proportional to 306,357.32, 422,765.71 and 170,390.85 is: 235,135.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,357.32 : 422,765.71 = 170,390.85 : x
  2. Step 2: Convert to fraction form
    306,357.32/422,765.71 = 170,390.85/x
  3. Step 3: Cross multiply
    306,357.32x = 422,765.71 × 170,390.85
  4. Step 4: Simplify right side
    306,357.32x = 72,035,408,251.78
  5. Step 5: Solve for x
    x = 72,035,408,251.78/306,357.32
  6. Step 6: Final answer
    x = 235,135.26

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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.