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Finding the Fourth Proportional to 395.61, 545.79 and 264.70

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Solution

The fourth proportional to 395.61, 545.79 and 264.70 is: 365.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.61 : 545.79 = 264.70 : x
  2. Step 2: Convert to fraction form
    395.61/545.79 = 264.70/x
  3. Step 3: Cross multiply
    395.61x = 545.79 × 264.70
  4. Step 4: Simplify right side
    395.61x = 144,470.61
  5. Step 5: Solve for x
    x = 144,470.61/395.61
  6. Step 6: Final answer
    x = 365.18

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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.