Home / 2,213.58-3,320.36-915.14

Finding the Fourth Proportional to 2,213.58, 3,320.36 and 915.14

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Solution

The fourth proportional to 2,213.58, 3,320.36 and 915.14 is: 1,372.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.58 : 3,320.36 = 915.14 : x
  2. Step 2: Convert to fraction form
    2,213.58/3,320.36 = 915.14/x
  3. Step 3: Cross multiply
    2,213.58x = 3,320.36 × 915.14
  4. Step 4: Simplify right side
    2,213.58x = 3,038,594.25
  5. Step 5: Solve for x
    x = 3,038,594.25/2,213.58
  6. Step 6: Final answer
    x = 1,372.71

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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.