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Finding the Fourth Proportional to 523.35, 722.20 and 290.47

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Solution

The fourth proportional to 523.35, 722.20 and 290.47 is: 400.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.35 : 722.20 = 290.47 : x
  2. Step 2: Convert to fraction form
    523.35/722.20 = 290.47/x
  3. Step 3: Cross multiply
    523.35x = 722.20 × 290.47
  4. Step 4: Simplify right side
    523.35x = 209,777.43
  5. Step 5: Solve for x
    x = 209,777.43/523.35
  6. Step 6: Final answer
    x = 400.84

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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.