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Finding the Fourth Proportional to 1,224.39, 1,689.72 and 700.59

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Solution

The fourth proportional to 1,224.39, 1,689.72 and 700.59 is: 966.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.39 : 1,689.72 = 700.59 : x
  2. Step 2: Convert to fraction form
    1,224.39/1,689.72 = 700.59/x
  3. Step 3: Cross multiply
    1,224.39x = 1,689.72 × 700.59
  4. Step 4: Simplify right side
    1,224.39x = 1,183,800.93
  5. Step 5: Solve for x
    x = 1,183,800.93/1,224.39
  6. Step 6: Final answer
    x = 966.85

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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.