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Finding the Fourth Proportional to 922.17, 1,272.57 and 523.80

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Solution

The fourth proportional to 922.17, 1,272.57 and 523.80 is: 722.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.17 : 1,272.57 = 523.80 : x
  2. Step 2: Convert to fraction form
    922.17/1,272.57 = 523.80/x
  3. Step 3: Cross multiply
    922.17x = 1,272.57 × 523.80
  4. Step 4: Simplify right side
    922.17x = 666,572.17
  5. Step 5: Solve for x
    x = 666,572.17/922.17
  6. Step 6: Final answer
    x = 722.83

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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.