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Finding the Fourth Proportional to 930.80, 1,395.40 and 497.52

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Solution

The fourth proportional to 930.80, 1,395.40 and 497.52 is: 745.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.80 : 1,395.40 = 497.52 : x
  2. Step 2: Convert to fraction form
    930.80/1,395.40 = 497.52/x
  3. Step 3: Cross multiply
    930.80x = 1,395.40 × 497.52
  4. Step 4: Simplify right side
    930.80x = 694,239.41
  5. Step 5: Solve for x
    x = 694,239.41/930.80
  6. Step 6: Final answer
    x = 745.85

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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.