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Finding the Fourth Proportional to 4,478.65, 6,718.36 and 1,191.74

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Solution

The fourth proportional to 4,478.65, 6,718.36 and 1,191.74 is: 1,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,478.65 : 6,718.36 = 1,191.74 : x
  2. Step 2: Convert to fraction form
    4,478.65/6,718.36 = 1,191.74/x
  3. Step 3: Cross multiply
    4,478.65x = 6,718.36 × 1,191.74
  4. Step 4: Simplify right side
    4,478.65x = 8,006,567.93
  5. Step 5: Solve for x
    x = 8,006,567.93/4,478.65
  6. Step 6: Final answer
    x = 1,787.72

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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.