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Finding the Fourth Proportional to 710.05, 979.81 and 395.33

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Solution

The fourth proportional to 710.05, 979.81 and 395.33 is: 545.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.05 : 979.81 = 395.33 : x
  2. Step 2: Convert to fraction form
    710.05/979.81 = 395.33/x
  3. Step 3: Cross multiply
    710.05x = 979.81 × 395.33
  4. Step 4: Simplify right side
    710.05x = 387,350.14
  5. Step 5: Solve for x
    x = 387,350.14/710.05
  6. Step 6: Final answer
    x = 545.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.