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Finding the Fourth Proportional to 2,452.40, 3,675.96 and 990.80

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Solution

The fourth proportional to 2,452.40, 3,675.96 and 990.80 is: 1,485.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,452.40 : 3,675.96 = 990.80 : x
  2. Step 2: Convert to fraction form
    2,452.40/3,675.96 = 990.80/x
  3. Step 3: Cross multiply
    2,452.40x = 3,675.96 × 990.80
  4. Step 4: Simplify right side
    2,452.40x = 3,642,141.17
  5. Step 5: Solve for x
    x = 3,642,141.17/2,452.40
  6. Step 6: Final answer
    x = 1,485.13

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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.