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Finding the Fourth Proportional to 1,157.31, 1,733.45 and 745.11

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Solution

The fourth proportional to 1,157.31, 1,733.45 and 745.11 is: 1,116.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,157.31 : 1,733.45 = 745.11 : x
  2. Step 2: Convert to fraction form
    1,157.31/1,733.45 = 745.11/x
  3. Step 3: Cross multiply
    1,157.31x = 1,733.45 × 745.11
  4. Step 4: Simplify right side
    1,157.31x = 1,291,607.20
  5. Step 5: Solve for x
    x = 1,291,607.20/1,157.31
  6. Step 6: Final answer
    x = 1,116.04

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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.