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Finding the Fourth Proportional to 929.73, 1,282.75 and 531.38

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Solution

The fourth proportional to 929.73, 1,282.75 and 531.38 is: 733.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.73 : 1,282.75 = 531.38 : x
  2. Step 2: Convert to fraction form
    929.73/1,282.75 = 531.38/x
  3. Step 3: Cross multiply
    929.73x = 1,282.75 × 531.38
  4. Step 4: Simplify right side
    929.73x = 681,619.95
  5. Step 5: Solve for x
    x = 681,619.95/929.73
  6. Step 6: Final answer
    x = 733.14

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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.