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Finding the Fourth Proportional to 3,512.81, 5,269.52 and 915.75

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Solution

The fourth proportional to 3,512.81, 5,269.52 and 915.75 is: 1,373.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.81 : 5,269.52 = 915.75 : x
  2. Step 2: Convert to fraction form
    3,512.81/5,269.52 = 915.75/x
  3. Step 3: Cross multiply
    3,512.81x = 5,269.52 × 915.75
  4. Step 4: Simplify right side
    3,512.81x = 4,825,562.94
  5. Step 5: Solve for x
    x = 4,825,562.94/3,512.81
  6. Step 6: Final answer
    x = 1,373.70

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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.