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Finding the Fourth Proportional to 470.81, 706.08 and 196.90

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Solution

The fourth proportional to 470.81, 706.08 and 196.90 is: 295.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.81 : 706.08 = 196.90 : x
  2. Step 2: Convert to fraction form
    470.81/706.08 = 196.90/x
  3. Step 3: Cross multiply
    470.81x = 706.08 × 196.90
  4. Step 4: Simplify right side
    470.81x = 139,026.13
  5. Step 5: Solve for x
    x = 139,026.13/470.81
  6. Step 6: Final answer
    x = 295.29

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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.