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Finding the Fourth Proportional to 710.36, 980.18 and 395.57

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Solution

The fourth proportional to 710.36, 980.18 and 395.57 is: 545.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.36 : 980.18 = 395.57 : x
  2. Step 2: Convert to fraction form
    710.36/980.18 = 395.57/x
  3. Step 3: Cross multiply
    710.36x = 980.18 × 395.57
  4. Step 4: Simplify right side
    710.36x = 387,722.92
  5. Step 5: Solve for x
    x = 387,722.92/710.36
  6. Step 6: Final answer
    x = 545.82

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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.