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Finding the Fourth Proportional to 2,113.95, 3,171.23 and 653.23

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Solution

The fourth proportional to 2,113.95, 3,171.23 and 653.23 is: 979.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.95 : 3,171.23 = 653.23 : x
  2. Step 2: Convert to fraction form
    2,113.95/3,171.23 = 653.23/x
  3. Step 3: Cross multiply
    2,113.95x = 3,171.23 × 653.23
  4. Step 4: Simplify right side
    2,113.95x = 2,071,542.57
  5. Step 5: Solve for x
    x = 2,071,542.57/2,113.95
  6. Step 6: Final answer
    x = 979.94

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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.