Home / 2,213.46-3,320.64-915.12

Finding the Fourth Proportional to 2,213.46, 3,320.64 and 915.12

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Solution

The fourth proportional to 2,213.46, 3,320.64 and 915.12 is: 1,372.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.46 : 3,320.64 = 915.12 : x
  2. Step 2: Convert to fraction form
    2,213.46/3,320.64 = 915.12/x
  3. Step 3: Cross multiply
    2,213.46x = 3,320.64 × 915.12
  4. Step 4: Simplify right side
    2,213.46x = 3,038,784.08
  5. Step 5: Solve for x
    x = 3,038,784.08/2,213.46
  6. Step 6: Final answer
    x = 1,372.87

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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.