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Finding the Fourth Proportional to 952.78, 1,427.16 and 489.15

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Solution

The fourth proportional to 952.78, 1,427.16 and 489.15 is: 732.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.78 : 1,427.16 = 489.15 : x
  2. Step 2: Convert to fraction form
    952.78/1,427.16 = 489.15/x
  3. Step 3: Cross multiply
    952.78x = 1,427.16 × 489.15
  4. Step 4: Simplify right side
    952.78x = 698,095.31
  5. Step 5: Solve for x
    x = 698,095.31/952.78
  6. Step 6: Final answer
    x = 732.69

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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.