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Finding the Fourth Proportional to 2,117.88, 3,175.74 and 868.05

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Solution

The fourth proportional to 2,117.88, 3,175.74 and 868.05 is: 1,301.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.88 : 3,175.74 = 868.05 : x
  2. Step 2: Convert to fraction form
    2,117.88/3,175.74 = 868.05/x
  3. Step 3: Cross multiply
    2,117.88x = 3,175.74 × 868.05
  4. Step 4: Simplify right side
    2,117.88x = 2,756,701.11
  5. Step 5: Solve for x
    x = 2,756,701.11/2,117.88
  6. Step 6: Final answer
    x = 1,301.63

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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.