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Finding the Fourth Proportional to 783.68, 1,175.64 and 235.79

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Solution

The fourth proportional to 783.68, 1,175.64 and 235.79 is: 353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    783.68 : 1,175.64 = 235.79 : x
  2. Step 2: Convert to fraction form
    783.68/1,175.64 = 235.79/x
  3. Step 3: Cross multiply
    783.68x = 1,175.64 × 235.79
  4. Step 4: Simplify right side
    783.68x = 277,204.16
  5. Step 5: Solve for x
    x = 277,204.16/783.68
  6. Step 6: Final answer
    x = 353.72

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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.