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Finding the Fourth Proportional to 922.61, 1,273.12 and 549.68

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Solution

The fourth proportional to 922.61, 1,273.12 and 549.68 is: 758.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.61 : 1,273.12 = 549.68 : x
  2. Step 2: Convert to fraction form
    922.61/1,273.12 = 549.68/x
  3. Step 3: Cross multiply
    922.61x = 1,273.12 × 549.68
  4. Step 4: Simplify right side
    922.61x = 699,800.86
  5. Step 5: Solve for x
    x = 699,800.86/922.61
  6. Step 6: Final answer
    x = 758.50

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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.