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Finding the Fourth Proportional to 369.59, 553.37 and 266.31

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Solution

The fourth proportional to 369.59, 553.37 and 266.31 is: 398.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.59 : 553.37 = 266.31 : x
  2. Step 2: Convert to fraction form
    369.59/553.37 = 266.31/x
  3. Step 3: Cross multiply
    369.59x = 553.37 × 266.31
  4. Step 4: Simplify right side
    369.59x = 147,366.63
  5. Step 5: Solve for x
    x = 147,366.63/369.59
  6. Step 6: Final answer
    x = 398.74

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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.