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Finding the Fourth Proportional to 269.55, 401.67 and 259.74

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Solution

The fourth proportional to 269.55, 401.67 and 259.74 is: 387.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.55 : 401.67 = 259.74 : x
  2. Step 2: Convert to fraction form
    269.55/401.67 = 259.74/x
  3. Step 3: Cross multiply
    269.55x = 401.67 × 259.74
  4. Step 4: Simplify right side
    269.55x = 104,329.77
  5. Step 5: Solve for x
    x = 104,329.77/269.55
  6. Step 6: Final answer
    x = 387.05

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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.