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Finding the Fourth Proportional to 425.00, 636.68 and 260.51

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Solution

The fourth proportional to 425.00, 636.68 and 260.51 is: 390.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.00 : 636.68 = 260.51 : x
  2. Step 2: Convert to fraction form
    425.00/636.68 = 260.51/x
  3. Step 3: Cross multiply
    425.00x = 636.68 × 260.51
  4. Step 4: Simplify right side
    425.00x = 165,857.02
  5. Step 5: Solve for x
    x = 165,857.02/425.00
  6. Step 6: Final answer
    x = 390.26

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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.