Home / 2,391.90-3,588.53-931.47

Finding the Fourth Proportional to 2,391.90, 3,588.53 and 931.47

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Solution

The fourth proportional to 2,391.90, 3,588.53 and 931.47 is: 1,397.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.90 : 3,588.53 = 931.47 : x
  2. Step 2: Convert to fraction form
    2,391.90/3,588.53 = 931.47/x
  3. Step 3: Cross multiply
    2,391.90x = 3,588.53 × 931.47
  4. Step 4: Simplify right side
    2,391.90x = 3,342,589.92
  5. Step 5: Solve for x
    x = 3,342,589.92/2,391.90
  6. Step 6: Final answer
    x = 1,397.46

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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.