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Finding the Fourth Proportional to 961.38, 1,442.30 and 277.38

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Solution

The fourth proportional to 961.38, 1,442.30 and 277.38 is: 416.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.38 : 1,442.30 = 277.38 : x
  2. Step 2: Convert to fraction form
    961.38/1,442.30 = 277.38/x
  3. Step 3: Cross multiply
    961.38x = 1,442.30 × 277.38
  4. Step 4: Simplify right side
    961.38x = 400,058.66
  5. Step 5: Solve for x
    x = 400,058.66/961.38
  6. Step 6: Final answer
    x = 416.13

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1.5x scale

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.