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Finding the Fourth Proportional to 784.79, 1,177.28 and 236.97

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Solution

The fourth proportional to 784.79, 1,177.28 and 236.97 is: 355.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.79 : 1,177.28 = 236.97 : x
  2. Step 2: Convert to fraction form
    784.79/1,177.28 = 236.97/x
  3. Step 3: Cross multiply
    784.79x = 1,177.28 × 236.97
  4. Step 4: Simplify right side
    784.79x = 278,972.97
  5. Step 5: Solve for x
    x = 278,972.97/784.79
  6. Step 6: Final answer
    x = 355.48

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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.