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Finding the Fourth Proportional to 523.73, 783.54 and 421.22

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Solution

The fourth proportional to 523.73, 783.54 and 421.22 is: 630.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.73 : 783.54 = 421.22 : x
  2. Step 2: Convert to fraction form
    523.73/783.54 = 421.22/x
  3. Step 3: Cross multiply
    523.73x = 783.54 × 421.22
  4. Step 4: Simplify right side
    523.73x = 330,044.68
  5. Step 5: Solve for x
    x = 330,044.68/523.73
  6. Step 6: Final answer
    x = 630.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.