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Finding the Fourth Proportional to 369.71, 550.19 and 357.40

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Solution

The fourth proportional to 369.71, 550.19 and 357.40 is: 531.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.71 : 550.19 = 357.40 : x
  2. Step 2: Convert to fraction form
    369.71/550.19 = 357.40/x
  3. Step 3: Cross multiply
    369.71x = 550.19 × 357.40
  4. Step 4: Simplify right side
    369.71x = 196,634.74
  5. Step 5: Solve for x
    x = 196,634.74/369.71
  6. Step 6: Final answer
    x = 531.87

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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.