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Finding the Fourth Proportional to 522.92, 784.75 and 421.43

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Solution

The fourth proportional to 522.92, 784.75 and 421.43 is: 632.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.92 : 784.75 = 421.43 : x
  2. Step 2: Convert to fraction form
    522.92/784.75 = 421.43/x
  3. Step 3: Cross multiply
    522.92x = 784.75 × 421.43
  4. Step 4: Simplify right side
    522.92x = 330,716.28
  5. Step 5: Solve for x
    x = 330,716.28/522.92
  6. Step 6: Final answer
    x = 632.44

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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.