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Finding the Fourth Proportional to 2,113.71, 3,171.18 and 880.49

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Solution

The fourth proportional to 2,113.71, 3,171.18 and 880.49 is: 1,320.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.71 : 3,171.18 = 880.49 : x
  2. Step 2: Convert to fraction form
    2,113.71/3,171.18 = 880.49/x
  3. Step 3: Cross multiply
    2,113.71x = 3,171.18 × 880.49
  4. Step 4: Simplify right side
    2,113.71x = 2,792,176.42
  5. Step 5: Solve for x
    x = 2,792,176.42/2,113.71
  6. Step 6: Final answer
    x = 1,320.98

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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.