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Finding the Fourth Proportional to 253,505.40, 380,238.30 and 66,512.04

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Solution

The fourth proportional to 253,505.40, 380,238.30 and 66,512.04 is: 99,762.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,505.40 : 380,238.30 = 66,512.04 : x
  2. Step 2: Convert to fraction form
    253,505.40/380,238.30 = 66,512.04/x
  3. Step 3: Cross multiply
    253,505.40x = 380,238.30 × 66,512.04
  4. Step 4: Simplify right side
    253,505.40x = 25,290,425,019.13
  5. Step 5: Solve for x
    x = 25,290,425,019.13/253,505.40
  6. Step 6: Final answer
    x = 99,762.87

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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.