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Finding the Fourth Proportional to 426.28, 636.23 and 392.08

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Solution

The fourth proportional to 426.28, 636.23 and 392.08 is: 585.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.28 : 636.23 = 392.08 : x
  2. Step 2: Convert to fraction form
    426.28/636.23 = 392.08/x
  3. Step 3: Cross multiply
    426.28x = 636.23 × 392.08
  4. Step 4: Simplify right side
    426.28x = 249,453.06
  5. Step 5: Solve for x
    x = 249,453.06/426.28
  6. Step 6: Final answer
    x = 585.19

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.