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Finding the Fourth Proportional to 3,512.96, 5,269.75 and 915.92

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Solution

The fourth proportional to 3,512.96, 5,269.75 and 915.92 is: 1,373.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,512.96 : 5,269.75 = 915.92 : x
  2. Step 2: Convert to fraction form
    3,512.96/5,269.75 = 915.92/x
  3. Step 3: Cross multiply
    3,512.96x = 5,269.75 × 915.92
  4. Step 4: Simplify right side
    3,512.96x = 4,826,669.42
  5. Step 5: Solve for x
    x = 4,826,669.42/3,512.96
  6. Step 6: Final answer
    x = 1,373.96

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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.