Home / 1,325.30-1,987.94-351.47

Finding the Fourth Proportional to 1,325.30, 1,987.94 and 351.47

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Solution

The fourth proportional to 1,325.30, 1,987.94 and 351.47 is: 527.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.30 : 1,987.94 = 351.47 : x
  2. Step 2: Convert to fraction form
    1,325.30/1,987.94 = 351.47/x
  3. Step 3: Cross multiply
    1,325.30x = 1,987.94 × 351.47
  4. Step 4: Simplify right side
    1,325.30x = 698,707.12
  5. Step 5: Solve for x
    x = 698,707.12/1,325.30
  6. Step 6: Final answer
    x = 527.21

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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.