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Finding the Fourth Proportional to 1,298.84, 1,957.03 and 1,072.79

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Solution

The fourth proportional to 1,298.84, 1,957.03 and 1,072.79 is: 1,616.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.84 : 1,957.03 = 1,072.79 : x
  2. Step 2: Convert to fraction form
    1,298.84/1,957.03 = 1,072.79/x
  3. Step 3: Cross multiply
    1,298.84x = 1,957.03 × 1,072.79
  4. Step 4: Simplify right side
    1,298.84x = 2,099,481.74
  5. Step 5: Solve for x
    x = 2,099,481.74/1,298.84
  6. Step 6: Final answer
    x = 1,616.43

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.