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Finding the Fourth Proportional to 3,224.32, 4,836.12 and 915.76

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Solution

The fourth proportional to 3,224.32, 4,836.12 and 915.76 is: 1,373.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,224.32 : 4,836.12 = 915.76 : x
  2. Step 2: Convert to fraction form
    3,224.32/4,836.12 = 915.76/x
  3. Step 3: Cross multiply
    3,224.32x = 4,836.12 × 915.76
  4. Step 4: Simplify right side
    3,224.32x = 4,428,725.25
  5. Step 5: Solve for x
    x = 4,428,725.25/3,224.32
  6. Step 6: Final answer
    x = 1,373.54

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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.