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Finding the Fourth Proportional to 873.18, 1,204.20 and 523.80

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Solution

The fourth proportional to 873.18, 1,204.20 and 523.80 is: 722.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.18 : 1,204.20 = 523.80 : x
  2. Step 2: Convert to fraction form
    873.18/1,204.20 = 523.80/x
  3. Step 3: Cross multiply
    873.18x = 1,204.20 × 523.80
  4. Step 4: Simplify right side
    873.18x = 630,759.96
  5. Step 5: Solve for x
    x = 630,759.96/873.18
  6. Step 6: Final answer
    x = 722.37

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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.