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Finding the Fourth Proportional to 324,648.18, 486,972.27 and 87,990.86

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Solution

The fourth proportional to 324,648.18, 486,972.27 and 87,990.86 is: 131,986.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,648.18 : 486,972.27 = 87,990.86 : x
  2. Step 2: Convert to fraction form
    324,648.18/486,972.27 = 87,990.86/x
  3. Step 3: Cross multiply
    324,648.18x = 486,972.27 × 87,990.86
  4. Step 4: Simplify right side
    324,648.18x = 42,849,105,958.64
  5. Step 5: Solve for x
    x = 42,849,105,958.64/324,648.18
  6. Step 6: Final answer
    x = 131,986.28

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Similar ratio
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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.