Home / 1,478.46-2,217.20-491.06

Finding the Fourth Proportional to 1,478.46, 2,217.20 and 491.06

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Solution

The fourth proportional to 1,478.46, 2,217.20 and 491.06 is: 736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,478.46 : 2,217.20 = 491.06 : x
  2. Step 2: Convert to fraction form
    1,478.46/2,217.20 = 491.06/x
  3. Step 3: Cross multiply
    1,478.46x = 2,217.20 × 491.06
  4. Step 4: Simplify right side
    1,478.46x = 1,088,778.23
  5. Step 5: Solve for x
    x = 1,088,778.23/1,478.46
  6. Step 6: Final answer
    x = 736.43

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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.