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Finding the Fourth Proportional to 372.13, 558.30 and 189.49

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Solution

The fourth proportional to 372.13, 558.30 and 189.49 is: 284.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.13 : 558.30 = 189.49 : x
  2. Step 2: Convert to fraction form
    372.13/558.30 = 189.49/x
  3. Step 3: Cross multiply
    372.13x = 558.30 × 189.49
  4. Step 4: Simplify right side
    372.13x = 105,792.27
  5. Step 5: Solve for x
    x = 105,792.27/372.13
  6. Step 6: Final answer
    x = 284.29

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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.