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Finding the Fourth Proportional to 3,561.50, 5,343.33 and 1,253

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Solution

The fourth proportional to 3,561.50, 5,343.33 and 1,253 is: 1,879.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.50 : 5,343.33 = 1,253 : x
  2. Step 2: Convert to fraction form
    3,561.50/5,343.33 = 1,253/x
  3. Step 3: Cross multiply
    3,561.50x = 5,343.33 × 1,253
  4. Step 4: Simplify right side
    3,561.50x = 6,695,192.49
  5. Step 5: Solve for x
    x = 6,695,192.49/3,561.50
  6. Step 6: Final answer
    x = 1,879.88

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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.