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Finding the Fourth Proportional to 418.37, 573.99 and 397.71

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Solution

The fourth proportional to 418.37, 573.99 and 397.71 is: 545.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.37 : 573.99 = 397.71 : x
  2. Step 2: Convert to fraction form
    418.37/573.99 = 397.71/x
  3. Step 3: Cross multiply
    418.37x = 573.99 × 397.71
  4. Step 4: Simplify right side
    418.37x = 228,280.07
  5. Step 5: Solve for x
    x = 228,280.07/418.37
  6. Step 6: Final answer
    x = 545.65

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.