Home / 1,147.62-1,721.40-325.92

Finding the Fourth Proportional to 1,147.62, 1,721.40 and 325.92

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Solution

The fourth proportional to 1,147.62, 1,721.40 and 325.92 is: 488.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.62 : 1,721.40 = 325.92 : x
  2. Step 2: Convert to fraction form
    1,147.62/1,721.40 = 325.92/x
  3. Step 3: Cross multiply
    1,147.62x = 1,721.40 × 325.92
  4. Step 4: Simplify right side
    1,147.62x = 561,038.69
  5. Step 5: Solve for x
    x = 561,038.69/1,147.62
  6. Step 6: Final answer
    x = 488.87

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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.