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Finding the Fourth Proportional to 426.98, 589.56 and 279.70

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Solution

The fourth proportional to 426.98, 589.56 and 279.70 is: 386.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.98 : 589.56 = 279.70 : x
  2. Step 2: Convert to fraction form
    426.98/589.56 = 279.70/x
  3. Step 3: Cross multiply
    426.98x = 589.56 × 279.70
  4. Step 4: Simplify right side
    426.98x = 164,899.93
  5. Step 5: Solve for x
    x = 164,899.93/426.98
  6. Step 6: Final answer
    x = 386.20

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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.