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Finding the Fourth Proportional to 2,170.79, 3,256.80 and 873.17

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Solution

The fourth proportional to 2,170.79, 3,256.80 and 873.17 is: 1,310.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.79 : 3,256.80 = 873.17 : x
  2. Step 2: Convert to fraction form
    2,170.79/3,256.80 = 873.17/x
  3. Step 3: Cross multiply
    2,170.79x = 3,256.80 × 873.17
  4. Step 4: Simplify right side
    2,170.79x = 2,843,740.06
  5. Step 5: Solve for x
    x = 2,843,740.06/2,170.79
  6. Step 6: Final answer
    x = 1,310.00

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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.