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Finding the Fourth Proportional to 373.20, 514.90 and 215.77

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Solution

The fourth proportional to 373.20, 514.90 and 215.77 is: 297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.20 : 514.90 = 215.77 : x
  2. Step 2: Convert to fraction form
    373.20/514.90 = 215.77/x
  3. Step 3: Cross multiply
    373.20x = 514.90 × 215.77
  4. Step 4: Simplify right side
    373.20x = 111,099.97
  5. Step 5: Solve for x
    x = 111,099.97/373.20
  6. Step 6: Final answer
    x = 297.70

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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.