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Finding the Fourth Proportional to 745.97, 1,029.47 and 497.39

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Solution

The fourth proportional to 745.97, 1,029.47 and 497.39 is: 686.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    745.97 : 1,029.47 = 497.39 : x
  2. Step 2: Convert to fraction form
    745.97/1,029.47 = 497.39/x
  3. Step 3: Cross multiply
    745.97x = 1,029.47 × 497.39
  4. Step 4: Simplify right side
    745.97x = 512,040.45
  5. Step 5: Solve for x
    x = 512,040.45/745.97
  6. Step 6: Final answer
    x = 686.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.