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Finding the Fourth Proportional to 913.52, 1,369.89 and 297.05

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Solution

The fourth proportional to 913.52, 1,369.89 and 297.05 is: 445.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    913.52 : 1,369.89 = 297.05 : x
  2. Step 2: Convert to fraction form
    913.52/1,369.89 = 297.05/x
  3. Step 3: Cross multiply
    913.52x = 1,369.89 × 297.05
  4. Step 4: Simplify right side
    913.52x = 406,918.98
  5. Step 5: Solve for x
    x = 406,918.98/913.52
  6. Step 6: Final answer
    x = 445.44

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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.