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Finding the Fourth Proportional to 395.74, 545.89 and 238.26

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Solution

The fourth proportional to 395.74, 545.89 and 238.26 is: 328.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.74 : 545.89 = 238.26 : x
  2. Step 2: Convert to fraction form
    395.74/545.89 = 238.26/x
  3. Step 3: Cross multiply
    395.74x = 545.89 × 238.26
  4. Step 4: Simplify right side
    395.74x = 130,065.71
  5. Step 5: Solve for x
    x = 130,065.71/395.74
  6. Step 6: Final answer
    x = 328.66

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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.