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Finding the Fourth Proportional to 784.31, 1,176.59 and 236.48

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Solution

The fourth proportional to 784.31, 1,176.59 and 236.48 is: 354.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.31 : 1,176.59 = 236.48 : x
  2. Step 2: Convert to fraction form
    784.31/1,176.59 = 236.48/x
  3. Step 3: Cross multiply
    784.31x = 1,176.59 × 236.48
  4. Step 4: Simplify right side
    784.31x = 278,241.76
  5. Step 5: Solve for x
    x = 278,241.76/784.31
  6. Step 6: Final answer
    x = 354.76

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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.