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Finding the Fourth Proportional to 372.65, 514.30 and 215.29

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Solution

The fourth proportional to 372.65, 514.30 and 215.29 is: 297.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.65 : 514.30 = 215.29 : x
  2. Step 2: Convert to fraction form
    372.65/514.30 = 215.29/x
  3. Step 3: Cross multiply
    372.65x = 514.30 × 215.29
  4. Step 4: Simplify right side
    372.65x = 110,720.00
  5. Step 5: Solve for x
    x = 110,720.00/372.65
  6. Step 6: Final answer
    x = 297.12

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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.