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Finding the Fourth Proportional to 487,517.12, 672,652.32 and 306,258.56

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Solution

The fourth proportional to 487,517.12, 672,652.32 and 306,258.56 is: 422,560.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,517.12 : 672,652.32 = 306,258.56 : x
  2. Step 2: Convert to fraction form
    487,517.12/672,652.32 = 306,258.56/x
  3. Step 3: Cross multiply
    487,517.12x = 672,652.32 × 306,258.56
  4. Step 4: Simplify right side
    487,517.12x = 206,005,530,903.86
  5. Step 5: Solve for x
    x = 206,005,530,903.86/487,517.12
  6. Step 6: Final answer
    x = 422,560.61

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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.