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Finding the Fourth Proportional to 1,399.17, 2,098.86 and 425.27

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Solution

The fourth proportional to 1,399.17, 2,098.86 and 425.27 is: 637.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.17 : 2,098.86 = 425.27 : x
  2. Step 2: Convert to fraction form
    1,399.17/2,098.86 = 425.27/x
  3. Step 3: Cross multiply
    1,399.17x = 2,098.86 × 425.27
  4. Step 4: Simplify right side
    1,399.17x = 892,582.19
  5. Step 5: Solve for x
    x = 892,582.19/1,399.17
  6. Step 6: Final answer
    x = 637.94

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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.