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Finding the Fourth Proportional to 216,610.72, 324,942 and 76,340.32

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Solution

The fourth proportional to 216,610.72, 324,942 and 76,340.32 is: 114,519.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,610.72 : 324,942 = 76,340.32 : x
  2. Step 2: Convert to fraction form
    216,610.72/324,942 = 76,340.32/x
  3. Step 3: Cross multiply
    216,610.72x = 324,942 × 76,340.32
  4. Step 4: Simplify right side
    216,610.72x = 24,806,176,261.44
  5. Step 5: Solve for x
    x = 24,806,176,261.44/216,610.72
  6. Step 6: Final answer
    x = 114,519.62

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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.