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Finding the Fourth Proportional to 2,617.62, 3,612.13 and 1,438.66

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Solution

The fourth proportional to 2,617.62, 3,612.13 and 1,438.66 is: 1,985.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,617.62 : 3,612.13 = 1,438.66 : x
  2. Step 2: Convert to fraction form
    2,617.62/3,612.13 = 1,438.66/x
  3. Step 3: Cross multiply
    2,617.62x = 3,612.13 × 1,438.66
  4. Step 4: Simplify right side
    2,617.62x = 5,196,626.95
  5. Step 5: Solve for x
    x = 5,196,626.95/2,617.62
  6. Step 6: Final answer
    x = 1,985.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.