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Finding the Fourth Proportional to 394.61, 545.09 and 360

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Solution

The fourth proportional to 394.61, 545.09 and 360 is: 497.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.61 : 545.09 = 360 : x
  2. Step 2: Convert to fraction form
    394.61/545.09 = 360/x
  3. Step 3: Cross multiply
    394.61x = 545.09 × 360
  4. Step 4: Simplify right side
    394.61x = 196,230.60
  5. Step 5: Solve for x
    x = 196,230.60/394.61
  6. Step 6: Final answer
    x = 497.28

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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.