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Finding the Fourth Proportional to 738.79, 1,108.17 and 190.96

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Solution

The fourth proportional to 738.79, 1,108.17 and 190.96 is: 286.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.79 : 1,108.17 = 190.96 : x
  2. Step 2: Convert to fraction form
    738.79/1,108.17 = 190.96/x
  3. Step 3: Cross multiply
    738.79x = 1,108.17 × 190.96
  4. Step 4: Simplify right side
    738.79x = 211,613.37
  5. Step 5: Solve for x
    x = 211,613.37/738.79
  6. Step 6: Final answer
    x = 286.43

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1.5x scale

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.