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Finding the Fourth Proportional to 922.38, 1,272.61 and 549.17

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Solution

The fourth proportional to 922.38, 1,272.61 and 549.17 is: 757.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.38 : 1,272.61 = 549.17 : x
  2. Step 2: Convert to fraction form
    922.38/1,272.61 = 549.17/x
  3. Step 3: Cross multiply
    922.38x = 1,272.61 × 549.17
  4. Step 4: Simplify right side
    922.38x = 698,879.23
  5. Step 5: Solve for x
    x = 698,879.23/922.38
  6. Step 6: Final answer
    x = 757.69

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Double scale
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1.5x scale

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.