Home / 1,349.44-2,020.28-915.80

Finding the Fourth Proportional to 1,349.44, 2,020.28 and 915.80

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Solution

The fourth proportional to 1,349.44, 2,020.28 and 915.80 is: 1,371.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.44 : 2,020.28 = 915.80 : x
  2. Step 2: Convert to fraction form
    1,349.44/2,020.28 = 915.80/x
  3. Step 3: Cross multiply
    1,349.44x = 2,020.28 × 915.80
  4. Step 4: Simplify right side
    1,349.44x = 1,850,172.42
  5. Step 5: Solve for x
    x = 1,850,172.42/1,349.44
  6. Step 6: Final answer
    x = 1,371.07

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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.