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Finding the Fourth Proportional to 741.38, 1,022.49 and 492.80

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Solution

The fourth proportional to 741.38, 1,022.49 and 492.80 is: 679.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.38 : 1,022.49 = 492.80 : x
  2. Step 2: Convert to fraction form
    741.38/1,022.49 = 492.80/x
  3. Step 3: Cross multiply
    741.38x = 1,022.49 × 492.80
  4. Step 4: Simplify right side
    741.38x = 503,877.96
  5. Step 5: Solve for x
    x = 503,877.96/741.38
  6. Step 6: Final answer
    x = 679.65

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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.