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Finding the Fourth Proportional to 918.69, 1,377.99 and 363.44

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Solution

The fourth proportional to 918.69, 1,377.99 and 363.44 is: 545.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.69 : 1,377.99 = 363.44 : x
  2. Step 2: Convert to fraction form
    918.69/1,377.99 = 363.44/x
  3. Step 3: Cross multiply
    918.69x = 1,377.99 × 363.44
  4. Step 4: Simplify right side
    918.69x = 500,809.80
  5. Step 5: Solve for x
    x = 500,809.80/918.69
  6. Step 6: Final answer
    x = 545.13

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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.