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Finding the Fourth Proportional to 259.66, 387.59 and 228.90

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Solution

The fourth proportional to 259.66, 387.59 and 228.90 is: 341.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.66 : 387.59 = 228.90 : x
  2. Step 2: Convert to fraction form
    259.66/387.59 = 228.90/x
  3. Step 3: Cross multiply
    259.66x = 387.59 × 228.90
  4. Step 4: Simplify right side
    259.66x = 88,720.09
  5. Step 5: Solve for x
    x = 88,720.09/259.66
  6. Step 6: Final answer
    x = 341.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.