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Finding the Fourth Proportional to 745.04, 1,117.56 and 739.28

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Solution

The fourth proportional to 745.04, 1,117.56 and 739.28 is: 1,108.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.04 : 1,117.56 = 739.28 : x
  2. Step 2: Convert to fraction form
    745.04/1,117.56 = 739.28/x
  3. Step 3: Cross multiply
    745.04x = 1,117.56 × 739.28
  4. Step 4: Simplify right side
    745.04x = 826,189.76
  5. Step 5: Solve for x
    x = 826,189.76/745.04
  6. Step 6: Final answer
    x = 1,108.92

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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.