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Finding the Fourth Proportional to 253,712.05, 380,642.79 and 76,246.11

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Solution

The fourth proportional to 253,712.05, 380,642.79 and 76,246.11 is: 114,391.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,712.05 : 380,642.79 = 76,246.11 : x
  2. Step 2: Convert to fraction form
    253,712.05/380,642.79 = 76,246.11/x
  3. Step 3: Cross multiply
    253,712.05x = 380,642.79 × 76,246.11
  4. Step 4: Simplify right side
    253,712.05x = 29,022,532,322.97
  5. Step 5: Solve for x
    x = 29,022,532,322.97/253,712.05
  6. Step 6: Final answer
    x = 114,391.62

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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.