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Finding the Fourth Proportional to 426.64, 588.36 and 279.40

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Solution

The fourth proportional to 426.64, 588.36 and 279.40 is: 385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.64 : 588.36 = 279.40 : x
  2. Step 2: Convert to fraction form
    426.64/588.36 = 279.40/x
  3. Step 3: Cross multiply
    426.64x = 588.36 × 279.40
  4. Step 4: Simplify right side
    426.64x = 164,387.78
  5. Step 5: Solve for x
    x = 164,387.78/426.64
  6. Step 6: Final answer
    x = 385.31

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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.