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Finding the Fourth Proportional to 426.48, 589.19 and 279.47

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Solution

The fourth proportional to 426.48, 589.19 and 279.47 is: 386.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.48 : 589.19 = 279.47 : x
  2. Step 2: Convert to fraction form
    426.48/589.19 = 279.47/x
  3. Step 3: Cross multiply
    426.48x = 589.19 × 279.47
  4. Step 4: Simplify right side
    426.48x = 164,656.59
  5. Step 5: Solve for x
    x = 164,656.59/426.48
  6. Step 6: Final answer
    x = 386.08

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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.