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Finding the Fourth Proportional to 579.95, 870.12 and 189.97

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Solution

The fourth proportional to 579.95, 870.12 and 189.97 is: 285.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.95 : 870.12 = 189.97 : x
  2. Step 2: Convert to fraction form
    579.95/870.12 = 189.97/x
  3. Step 3: Cross multiply
    579.95x = 870.12 × 189.97
  4. Step 4: Simplify right side
    579.95x = 165,296.70
  5. Step 5: Solve for x
    x = 165,296.70/579.95
  6. Step 6: Final answer
    x = 285.02

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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.