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Finding the Fourth Proportional to 1,284.24, 1,772.25 and 694.77

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Solution

The fourth proportional to 1,284.24, 1,772.25 and 694.77 is: 958.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.24 : 1,772.25 = 694.77 : x
  2. Step 2: Convert to fraction form
    1,284.24/1,772.25 = 694.77/x
  3. Step 3: Cross multiply
    1,284.24x = 1,772.25 × 694.77
  4. Step 4: Simplify right side
    1,284.24x = 1,231,307.07
  5. Step 5: Solve for x
    x = 1,231,307.07/1,284.24
  6. Step 6: Final answer
    x = 958.79

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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.