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Finding the Fourth Proportional to 1,479.37, 2,220.42 and 749.46

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Solution

The fourth proportional to 1,479.37, 2,220.42 and 749.46 is: 1,124.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.37 : 2,220.42 = 749.46 : x
  2. Step 2: Convert to fraction form
    1,479.37/2,220.42 = 749.46/x
  3. Step 3: Cross multiply
    1,479.37x = 2,220.42 × 749.46
  4. Step 4: Simplify right side
    1,479.37x = 1,664,115.97
  5. Step 5: Solve for x
    x = 1,664,115.97/1,479.37
  6. Step 6: Final answer
    x = 1,124.88

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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.