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Finding the Fourth Proportional to 523.76, 722.80 and 290.90

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Solution

The fourth proportional to 523.76, 722.80 and 290.90 is: 401.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.76 : 722.80 = 290.90 : x
  2. Step 2: Convert to fraction form
    523.76/722.80 = 290.90/x
  3. Step 3: Cross multiply
    523.76x = 722.80 × 290.90
  4. Step 4: Simplify right side
    523.76x = 210,262.52
  5. Step 5: Solve for x
    x = 210,262.52/523.76
  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.