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Finding the Fourth Proportional to 784.10, 1,176.42 and 236.27

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Solution

The fourth proportional to 784.10, 1,176.42 and 236.27 is: 354.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.10 : 1,176.42 = 236.27 : x
  2. Step 2: Convert to fraction form
    784.10/1,176.42 = 236.27/x
  3. Step 3: Cross multiply
    784.10x = 1,176.42 × 236.27
  4. Step 4: Simplify right side
    784.10x = 277,946.87
  5. Step 5: Solve for x
    x = 277,946.87/784.10
  6. Step 6: Final answer
    x = 354.48

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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.