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Finding the Fourth Proportional to 1,101.26, 1,651.20 and 842.93

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Solution

The fourth proportional to 1,101.26, 1,651.20 and 842.93 is: 1,263.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.26 : 1,651.20 = 842.93 : x
  2. Step 2: Convert to fraction form
    1,101.26/1,651.20 = 842.93/x
  3. Step 3: Cross multiply
    1,101.26x = 1,651.20 × 842.93
  4. Step 4: Simplify right side
    1,101.26x = 1,391,846.02
  5. Step 5: Solve for x
    x = 1,391,846.02/1,101.26
  6. Step 6: Final answer
    x = 1,263.87

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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.