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Finding the Fourth Proportional to 3,445.15, 5,167.70 and 979.65

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Solution

The fourth proportional to 3,445.15, 5,167.70 and 979.65 is: 1,469.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,445.15 : 5,167.70 = 979.65 : x
  2. Step 2: Convert to fraction form
    3,445.15/5,167.70 = 979.65/x
  3. Step 3: Cross multiply
    3,445.15x = 5,167.70 × 979.65
  4. Step 4: Simplify right side
    3,445.15x = 5,062,506.57
  5. Step 5: Solve for x
    x = 5,062,506.57/3,445.15
  6. Step 6: Final answer
    x = 1,469.46

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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.