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Finding the Fourth Proportional to 710.10, 980.00 and 395.42

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Solution

The fourth proportional to 710.10, 980.00 and 395.42 is: 545.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.10 : 980.00 = 395.42 : x
  2. Step 2: Convert to fraction form
    710.10/980.00 = 395.42/x
  3. Step 3: Cross multiply
    710.10x = 980.00 × 395.42
  4. Step 4: Simplify right side
    710.10x = 387,512.07
  5. Step 5: Solve for x
    x = 387,512.07/710.10
  6. Step 6: Final answer
    x = 545.71

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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.