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Finding the Fourth Proportional to 709.66, 1,065.09 and 363.38

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Solution

The fourth proportional to 709.66, 1,065.09 and 363.38 is: 545.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.66 : 1,065.09 = 363.38 : x
  2. Step 2: Convert to fraction form
    709.66/1,065.09 = 363.38/x
  3. Step 3: Cross multiply
    709.66x = 1,065.09 × 363.38
  4. Step 4: Simplify right side
    709.66x = 387,032.40
  5. Step 5: Solve for x
    x = 387,032.40/709.66
  6. Step 6: Final answer
    x = 545.38

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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.