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Finding the Fourth Proportional to 373.18, 515.09 and 215.89

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Solution

The fourth proportional to 373.18, 515.09 and 215.89 is: 297.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.18 : 515.09 = 215.89 : x
  2. Step 2: Convert to fraction form
    373.18/515.09 = 215.89/x
  3. Step 3: Cross multiply
    373.18x = 515.09 × 215.89
  4. Step 4: Simplify right side
    373.18x = 111,202.78
  5. Step 5: Solve for x
    x = 111,202.78/373.18
  6. Step 6: Final answer
    x = 297.99

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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.