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Finding the Fourth Proportional to 620.17, 929.98 and 187.22

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Solution

The fourth proportional to 620.17, 929.98 and 187.22 is: 280.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.17 : 929.98 = 187.22 : x
  2. Step 2: Convert to fraction form
    620.17/929.98 = 187.22/x
  3. Step 3: Cross multiply
    620.17x = 929.98 × 187.22
  4. Step 4: Simplify right side
    620.17x = 174,109.92
  5. Step 5: Solve for x
    x = 174,109.92/620.17
  6. Step 6: Final answer
    x = 280.75

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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.