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Finding the Fourth Proportional to 372.99, 559.58 and 210.78

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Solution

The fourth proportional to 372.99, 559.58 and 210.78 is: 316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.99 : 559.58 = 210.78 : x
  2. Step 2: Convert to fraction form
    372.99/559.58 = 210.78/x
  3. Step 3: Cross multiply
    372.99x = 559.58 × 210.78
  4. Step 4: Simplify right side
    372.99x = 117,947.22
  5. Step 5: Solve for x
    x = 117,947.22/372.99
  6. Step 6: Final answer
    x = 316.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.