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Finding the Fourth Proportional to 3,586.78, 5,378.10 and 1,637.11

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Solution

The fourth proportional to 3,586.78, 5,378.10 and 1,637.11 is: 2,454.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,586.78 : 5,378.10 = 1,637.11 : x
  2. Step 2: Convert to fraction form
    3,586.78/5,378.10 = 1,637.11/x
  3. Step 3: Cross multiply
    3,586.78x = 5,378.10 × 1,637.11
  4. Step 4: Simplify right side
    3,586.78x = 8,804,541.29
  5. Step 5: Solve for x
    x = 8,804,541.29/3,586.78
  6. Step 6: Final answer
    x = 2,454.72

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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.