Home / 1,355.11-2,031.68-915.26

Finding the Fourth Proportional to 1,355.11, 2,031.68 and 915.26

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Solution

The fourth proportional to 1,355.11, 2,031.68 and 915.26 is: 1,372.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.11 : 2,031.68 = 915.26 : x
  2. Step 2: Convert to fraction form
    1,355.11/2,031.68 = 915.26/x
  3. Step 3: Cross multiply
    1,355.11x = 2,031.68 × 915.26
  4. Step 4: Simplify right side
    1,355.11x = 1,859,508.07
  5. Step 5: Solve for x
    x = 1,859,508.07/1,355.11
  6. Step 6: Final answer
    x = 1,372.22

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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.