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Finding the Fourth Proportional to 652.20, 978.22 and 190.05

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Solution

The fourth proportional to 652.20, 978.22 and 190.05 is: 285.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.20 : 978.22 = 190.05 : x
  2. Step 2: Convert to fraction form
    652.20/978.22 = 190.05/x
  3. Step 3: Cross multiply
    652.20x = 978.22 × 190.05
  4. Step 4: Simplify right side
    652.20x = 185,910.71
  5. Step 5: Solve for x
    x = 185,910.71/652.20
  6. Step 6: Final answer
    x = 285.05

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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.