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Finding the Fourth Proportional to 1,174.40, 1,772.16 and 1,131.52

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Solution

The fourth proportional to 1,174.40, 1,772.16 and 1,131.52 is: 1,707.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,174.40 : 1,772.16 = 1,131.52 : x
  2. Step 2: Convert to fraction form
    1,174.40/1,772.16 = 1,131.52/x
  3. Step 3: Cross multiply
    1,174.40x = 1,772.16 × 1,131.52
  4. Step 4: Simplify right side
    1,174.40x = 2,005,234.48
  5. Step 5: Solve for x
    x = 2,005,234.48/1,174.40
  6. Step 6: Final answer
    x = 1,707.45

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.