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Finding the Fourth Proportional to 474.51, 711.79 and 166.40

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Solution

The fourth proportional to 474.51, 711.79 and 166.40 is: 249.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.51 : 711.79 = 166.40 : x
  2. Step 2: Convert to fraction form
    474.51/711.79 = 166.40/x
  3. Step 3: Cross multiply
    474.51x = 711.79 × 166.40
  4. Step 4: Simplify right side
    474.51x = 118,441.86
  5. Step 5: Solve for x
    x = 118,441.86/474.51
  6. Step 6: Final answer
    x = 249.61

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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.