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Finding the Fourth Proportional to 1,257.84, 1,886.76 and 488.34

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Solution

The fourth proportional to 1,257.84, 1,886.76 and 488.34 is: 732.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,257.84 : 1,886.76 = 488.34 : x
  2. Step 2: Convert to fraction form
    1,257.84/1,886.76 = 488.34/x
  3. Step 3: Cross multiply
    1,257.84x = 1,886.76 × 488.34
  4. Step 4: Simplify right side
    1,257.84x = 921,380.38
  5. Step 5: Solve for x
    x = 921,380.38/1,257.84
  6. Step 6: Final answer
    x = 732.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.