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Finding the Fourth Proportional to 372.89, 514.55 and 215.52

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Solution

The fourth proportional to 372.89, 514.55 and 215.52 is: 297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.89 : 514.55 = 215.52 : x
  2. Step 2: Convert to fraction form
    372.89/514.55 = 215.52/x
  3. Step 3: Cross multiply
    372.89x = 514.55 × 215.52
  4. Step 4: Simplify right side
    372.89x = 110,894.74
  5. Step 5: Solve for x
    x = 110,894.74/372.89
  6. Step 6: Final answer
    x = 297.40

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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.