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Finding the Fourth Proportional to 1,099.66, 1,648.97 and 637.57

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Solution

The fourth proportional to 1,099.66, 1,648.97 and 637.57 is: 956.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,099.66 : 1,648.97 = 637.57 : x
  2. Step 2: Convert to fraction form
    1,099.66/1,648.97 = 637.57/x
  3. Step 3: Cross multiply
    1,099.66x = 1,648.97 × 637.57
  4. Step 4: Simplify right side
    1,099.66x = 1,051,323.96
  5. Step 5: Solve for x
    x = 1,051,323.96/1,099.66
  6. Step 6: Final answer
    x = 956.05

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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.