Home / 1,325.52-1,988.40-1,172.85

Finding the Fourth Proportional to 1,325.52, 1,988.40 and 1,172.85

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Solution

The fourth proportional to 1,325.52, 1,988.40 and 1,172.85 is: 1,759.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.52 : 1,988.40 = 1,172.85 : x
  2. Step 2: Convert to fraction form
    1,325.52/1,988.40 = 1,172.85/x
  3. Step 3: Cross multiply
    1,325.52x = 1,988.40 × 1,172.85
  4. Step 4: Simplify right side
    1,325.52x = 2,332,094.94
  5. Step 5: Solve for x
    x = 2,332,094.94/1,325.52
  6. Step 6: Final answer
    x = 1,759.38

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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.