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Finding the Fourth Proportional to 523.77, 722.84 and 290.90

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Solution

The fourth proportional to 523.77, 722.84 and 290.90 is: 401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.77 : 722.84 = 290.90 : x
  2. Step 2: Convert to fraction form
    523.77/722.84 = 290.90/x
  3. Step 3: Cross multiply
    523.77x = 722.84 × 290.90
  4. Step 4: Simplify right side
    523.77x = 210,269.09
  5. Step 5: Solve for x
    x = 210,269.09/523.77
  6. Step 6: Final answer
    x = 401.45

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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.