Home / 727.03-1,090.20-315.95

Finding the Fourth Proportional to 727.03, 1,090.20 and 315.95

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Solution

The fourth proportional to 727.03, 1,090.20 and 315.95 is: 473.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.03 : 1,090.20 = 315.95 : x
  2. Step 2: Convert to fraction form
    727.03/1,090.20 = 315.95/x
  3. Step 3: Cross multiply
    727.03x = 1,090.20 × 315.95
  4. Step 4: Simplify right side
    727.03x = 344,448.69
  5. Step 5: Solve for x
    x = 344,448.69/727.03
  6. Step 6: Final answer
    x = 473.78

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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.