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Finding the Fourth Proportional to 682.34, 1,020.87 and 477.26

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Solution

The fourth proportional to 682.34, 1,020.87 and 477.26 is: 714.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    682.34 : 1,020.87 = 477.26 : x
  2. Step 2: Convert to fraction form
    682.34/1,020.87 = 477.26/x
  3. Step 3: Cross multiply
    682.34x = 1,020.87 × 477.26
  4. Step 4: Simplify right side
    682.34x = 487,220.42
  5. Step 5: Solve for x
    x = 487,220.42/682.34
  6. Step 6: Final answer
    x = 714.04

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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.