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Finding the Fourth Proportional to 279.86, 420.60 and 184.28

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Solution

The fourth proportional to 279.86, 420.60 and 184.28 is: 276.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.86 : 420.60 = 184.28 : x
  2. Step 2: Convert to fraction form
    279.86/420.60 = 184.28/x
  3. Step 3: Cross multiply
    279.86x = 420.60 × 184.28
  4. Step 4: Simplify right side
    279.86x = 77,508.17
  5. Step 5: Solve for x
    x = 77,508.17/279.86
  6. Step 6: Final answer
    x = 276.95

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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.