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Finding the Fourth Proportional to 2,672.60, 4,009.10 and 724.78

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Solution

The fourth proportional to 2,672.60, 4,009.10 and 724.78 is: 1,087.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.60 : 4,009.10 = 724.78 : x
  2. Step 2: Convert to fraction form
    2,672.60/4,009.10 = 724.78/x
  3. Step 3: Cross multiply
    2,672.60x = 4,009.10 × 724.78
  4. Step 4: Simplify right side
    2,672.60x = 2,905,715.50
  5. Step 5: Solve for x
    x = 2,905,715.50/2,672.60
  6. Step 6: Final answer
    x = 1,087.22

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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.