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Finding the Fourth Proportional to 522.31, 783.46 and 214.09

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Solution

The fourth proportional to 522.31, 783.46 and 214.09 is: 321.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.31 : 783.46 = 214.09 : x
  2. Step 2: Convert to fraction form
    522.31/783.46 = 214.09/x
  3. Step 3: Cross multiply
    522.31x = 783.46 × 214.09
  4. Step 4: Simplify right side
    522.31x = 167,730.95
  5. Step 5: Solve for x
    x = 167,730.95/522.31
  6. Step 6: Final answer
    x = 321.13

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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.