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Finding the Fourth Proportional to 2,117.05, 3,175.55 and 656.20

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Solution

The fourth proportional to 2,117.05, 3,175.55 and 656.20 is: 984.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.05 : 3,175.55 = 656.20 : x
  2. Step 2: Convert to fraction form
    2,117.05/3,175.55 = 656.20/x
  3. Step 3: Cross multiply
    2,117.05x = 3,175.55 × 656.20
  4. Step 4: Simplify right side
    2,117.05x = 2,083,792.63
  5. Step 5: Solve for x
    x = 2,083,792.63/2,117.05
  6. Step 6: Final answer
    x = 984.29

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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.