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Finding the Fourth Proportional to 426.31, 588.80 and 279.59

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Solution

The fourth proportional to 426.31, 588.80 and 279.59 is: 386.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.31 : 588.80 = 279.59 : x
  2. Step 2: Convert to fraction form
    426.31/588.80 = 279.59/x
  3. Step 3: Cross multiply
    426.31x = 588.80 × 279.59
  4. Step 4: Simplify right side
    426.31x = 164,622.67
  5. Step 5: Solve for x
    x = 164,622.67/426.31
  6. Step 6: Final answer
    x = 386.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.