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Finding the Fourth Proportional to 1,231.93, 1,700 and 672.38

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Solution

The fourth proportional to 1,231.93, 1,700 and 672.38 is: 927.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.93 : 1,700 = 672.38 : x
  2. Step 2: Convert to fraction form
    1,231.93/1,700 = 672.38/x
  3. Step 3: Cross multiply
    1,231.93x = 1,700 × 672.38
  4. Step 4: Simplify right side
    1,231.93x = 1,143,046
  5. Step 5: Solve for x
    x = 1,143,046/1,231.93
  6. Step 6: Final answer
    x = 927.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.