Home / 1,325.40-1,988.30-492.52

Finding the Fourth Proportional to 1,325.40, 1,988.30 and 492.52

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Solution

The fourth proportional to 1,325.40, 1,988.30 and 492.52 is: 738.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.40 : 1,988.30 = 492.52 : x
  2. Step 2: Convert to fraction form
    1,325.40/1,988.30 = 492.52/x
  3. Step 3: Cross multiply
    1,325.40x = 1,988.30 × 492.52
  4. Step 4: Simplify right side
    1,325.40x = 979,277.52
  5. Step 5: Solve for x
    x = 979,277.52/1,325.40
  6. Step 6: Final answer
    x = 738.85

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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.