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Finding the Fourth Proportional to 710.16, 980.09 and 395.46

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Solution

The fourth proportional to 710.16, 980.09 and 395.46 is: 545.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.16 : 980.09 = 395.46 : x
  2. Step 2: Convert to fraction form
    710.16/980.09 = 395.46/x
  3. Step 3: Cross multiply
    710.16x = 980.09 × 395.46
  4. Step 4: Simplify right side
    710.16x = 387,584.41
  5. Step 5: Solve for x
    x = 387,584.41/710.16
  6. Step 6: Final answer
    x = 545.77

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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.