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Finding the Fourth Proportional to 372.87, 514.55 and 215.51

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Solution

The fourth proportional to 372.87, 514.55 and 215.51 is: 297.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.87 : 514.55 = 215.51 : x
  2. Step 2: Convert to fraction form
    372.87/514.55 = 215.51/x
  3. Step 3: Cross multiply
    372.87x = 514.55 × 215.51
  4. Step 4: Simplify right side
    372.87x = 110,888.64
  5. Step 5: Solve for x
    x = 110,888.64/372.87
  6. Step 6: Final answer
    x = 297.39

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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.