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Finding the Fourth Proportional to 1,557.84, 2,149.52 and 936.88

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Solution

The fourth proportional to 1,557.84, 2,149.52 and 936.88 is: 1,292.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,557.84 : 2,149.52 = 936.88 : x
  2. Step 2: Convert to fraction form
    1,557.84/2,149.52 = 936.88/x
  3. Step 3: Cross multiply
    1,557.84x = 2,149.52 × 936.88
  4. Step 4: Simplify right side
    1,557.84x = 2,013,842.30
  5. Step 5: Solve for x
    x = 2,013,842.30/1,557.84
  6. Step 6: Final answer
    x = 1,292.71

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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.