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Finding the Fourth Proportional to 1,048.79, 1,447.21 and 754.67

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Solution

The fourth proportional to 1,048.79, 1,447.21 and 754.67 is: 1,041.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,048.79 : 1,447.21 = 754.67 : x
  2. Step 2: Convert to fraction form
    1,048.79/1,447.21 = 754.67/x
  3. Step 3: Cross multiply
    1,048.79x = 1,447.21 × 754.67
  4. Step 4: Simplify right side
    1,048.79x = 1,092,165.97
  5. Step 5: Solve for x
    x = 1,092,165.97/1,048.79
  6. Step 6: Final answer
    x = 1,041.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.