Home / 3,381.30-5,072.18-915.80

Finding the Fourth Proportional to 3,381.30, 5,072.18 and 915.80

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Solution

The fourth proportional to 3,381.30, 5,072.18 and 915.80 is: 1,373.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,381.30 : 5,072.18 = 915.80 : x
  2. Step 2: Convert to fraction form
    3,381.30/5,072.18 = 915.80/x
  3. Step 3: Cross multiply
    3,381.30x = 5,072.18 × 915.80
  4. Step 4: Simplify right side
    3,381.30x = 4,645,072.50
  5. Step 5: Solve for x
    x = 4,645,072.50/3,381.30
  6. Step 6: Final answer
    x = 1,373.75

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1.5x scale

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.