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Finding the Fourth Proportional to 1,231.94, 1,700.24 and 707.97

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Solution

The fourth proportional to 1,231.94, 1,700.24 and 707.97 is: 977.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.94 : 1,700.24 = 707.97 : x
  2. Step 2: Convert to fraction form
    1,231.94/1,700.24 = 707.97/x
  3. Step 3: Cross multiply
    1,231.94x = 1,700.24 × 707.97
  4. Step 4: Simplify right side
    1,231.94x = 1,203,718.91
  5. Step 5: Solve for x
    x = 1,203,718.91/1,231.94
  6. Step 6: Final answer
    x = 977.09

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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.