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Finding the Fourth Proportional to 1,948.38, 2,922.69 and 487.55

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Solution

The fourth proportional to 1,948.38, 2,922.69 and 487.55 is: 731.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,948.38 : 2,922.69 = 487.55 : x
  2. Step 2: Convert to fraction form
    1,948.38/2,922.69 = 487.55/x
  3. Step 3: Cross multiply
    1,948.38x = 2,922.69 × 487.55
  4. Step 4: Simplify right side
    1,948.38x = 1,424,942.90
  5. Step 5: Solve for x
    x = 1,424,942.90/1,948.38
  6. Step 6: Final answer
    x = 731.35

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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.