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Finding the Fourth Proportional to 373.20, 515.22 and 286.04

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Solution

The fourth proportional to 373.20, 515.22 and 286.04 is: 394.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.20 : 515.22 = 286.04 : x
  2. Step 2: Convert to fraction form
    373.20/515.22 = 286.04/x
  3. Step 3: Cross multiply
    373.20x = 515.22 × 286.04
  4. Step 4: Simplify right side
    373.20x = 147,373.53
  5. Step 5: Solve for x
    x = 147,373.53/373.20
  6. Step 6: Final answer
    x = 394.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.