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Finding the Fourth Proportional to 745.26, 1,124.56 and 715.29

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Solution

The fourth proportional to 745.26, 1,124.56 and 715.29 is: 1,079.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.26 : 1,124.56 = 715.29 : x
  2. Step 2: Convert to fraction form
    745.26/1,124.56 = 715.29/x
  3. Step 3: Cross multiply
    745.26x = 1,124.56 × 715.29
  4. Step 4: Simplify right side
    745.26x = 804,386.52
  5. Step 5: Solve for x
    x = 804,386.52/745.26
  6. Step 6: Final answer
    x = 1,079.34

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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.