Home / 1,147.60-1,721.40-325.87

Finding the Fourth Proportional to 1,147.60, 1,721.40 and 325.87

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Solution

The fourth proportional to 1,147.60, 1,721.40 and 325.87 is: 488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.60 : 1,721.40 = 325.87 : x
  2. Step 2: Convert to fraction form
    1,147.60/1,721.40 = 325.87/x
  3. Step 3: Cross multiply
    1,147.60x = 1,721.40 × 325.87
  4. Step 4: Simplify right side
    1,147.60x = 560,958.61
  5. Step 5: Solve for x
    x = 560,958.61/1,147.60
  6. Step 6: Final answer
    x = 488.81

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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.