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Finding the Fourth Proportional to 395.68, 545.70 and 240.16

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Solution

The fourth proportional to 395.68, 545.70 and 240.16 is: 331.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.68 : 545.70 = 240.16 : x
  2. Step 2: Convert to fraction form
    395.68/545.70 = 240.16/x
  3. Step 3: Cross multiply
    395.68x = 545.70 × 240.16
  4. Step 4: Simplify right side
    395.68x = 131,055.31
  5. Step 5: Solve for x
    x = 131,055.31/395.68
  6. Step 6: Final answer
    x = 331.22

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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.