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Finding the Fourth Proportional to 4,478.56, 6,718.17 and 1,191.64

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Solution

The fourth proportional to 4,478.56, 6,718.17 and 1,191.64 is: 1,787.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.56 : 6,718.17 = 1,191.64 : x
  2. Step 2: Convert to fraction form
    4,478.56/6,718.17 = 1,191.64/x
  3. Step 3: Cross multiply
    4,478.56x = 6,718.17 × 1,191.64
  4. Step 4: Simplify right side
    4,478.56x = 8,005,640.10
  5. Step 5: Solve for x
    x = 8,005,640.10/4,478.56
  6. Step 6: Final answer
    x = 1,787.55

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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.