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Finding the Fourth Proportional to 2,391.78, 3,587.57 and 832.14

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Solution

The fourth proportional to 2,391.78, 3,587.57 and 832.14 is: 1,248.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.78 : 3,587.57 = 832.14 : x
  2. Step 2: Convert to fraction form
    2,391.78/3,587.57 = 832.14/x
  3. Step 3: Cross multiply
    2,391.78x = 3,587.57 × 832.14
  4. Step 4: Simplify right side
    2,391.78x = 2,985,362.58
  5. Step 5: Solve for x
    x = 2,985,362.58/2,391.78
  6. Step 6: Final answer
    x = 1,248.18

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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.