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Finding the Fourth Proportional to 301.92, 416.76 and 191.40

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Solution

The fourth proportional to 301.92, 416.76 and 191.40 is: 264.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    301.92 : 416.76 = 191.40 : x
  2. Step 2: Convert to fraction form
    301.92/416.76 = 191.40/x
  3. Step 3: Cross multiply
    301.92x = 416.76 × 191.40
  4. Step 4: Simplify right side
    301.92x = 79,767.86
  5. Step 5: Solve for x
    x = 79,767.86/301.92
  6. Step 6: Final answer
    x = 264.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.