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Finding the Fourth Proportional to 426.77, 639.65 and 375.51

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Solution

The fourth proportional to 426.77, 639.65 and 375.51 is: 562.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.77 : 639.65 = 375.51 : x
  2. Step 2: Convert to fraction form
    426.77/639.65 = 375.51/x
  3. Step 3: Cross multiply
    426.77x = 639.65 × 375.51
  4. Step 4: Simplify right side
    426.77x = 240,193.09
  5. Step 5: Solve for x
    x = 240,193.09/426.77
  6. Step 6: Final answer
    x = 562.82

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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.