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Finding the Fourth Proportional to 218,613.76, 328,015.94 and 76,560.94

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Solution

The fourth proportional to 218,613.76, 328,015.94 and 76,560.94 is: 114,874.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,613.76 : 328,015.94 = 76,560.94 : x
  2. Step 2: Convert to fraction form
    218,613.76/328,015.94 = 76,560.94/x
  3. Step 3: Cross multiply
    218,613.76x = 328,015.94 × 76,560.94
  4. Step 4: Simplify right side
    218,613.76x = 25,113,208,728.60
  5. Step 5: Solve for x
    x = 25,113,208,728.60/218,613.76
  6. Step 6: Final answer
    x = 114,874.79

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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.