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Finding the Fourth Proportional to 746.92, 1,029.18 and 497.80

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Solution

The fourth proportional to 746.92, 1,029.18 and 497.80 is: 685.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.92 : 1,029.18 = 497.80 : x
  2. Step 2: Convert to fraction form
    746.92/1,029.18 = 497.80/x
  3. Step 3: Cross multiply
    746.92x = 1,029.18 × 497.80
  4. Step 4: Simplify right side
    746.92x = 512,325.80
  5. Step 5: Solve for x
    x = 512,325.80/746.92
  6. Step 6: Final answer
    x = 685.92

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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.