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Finding the Fourth Proportional to 4,478.87, 6,718.64 and 1,191.89

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Solution

The fourth proportional to 4,478.87, 6,718.64 and 1,191.89 is: 1,787.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.87 : 6,718.64 = 1,191.89 : x
  2. Step 2: Convert to fraction form
    4,478.87/6,718.64 = 1,191.89/x
  3. Step 3: Cross multiply
    4,478.87x = 6,718.64 × 1,191.89
  4. Step 4: Simplify right side
    4,478.87x = 8,007,840.28
  5. Step 5: Solve for x
    x = 8,007,840.28/4,478.87
  6. Step 6: Final answer
    x = 1,787.92

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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.