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Finding the Fourth Proportional to 647.19, 892.49 and 522.81

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Solution

The fourth proportional to 647.19, 892.49 and 522.81 is: 720.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.19 : 892.49 = 522.81 : x
  2. Step 2: Convert to fraction form
    647.19/892.49 = 522.81/x
  3. Step 3: Cross multiply
    647.19x = 892.49 × 522.81
  4. Step 4: Simplify right side
    647.19x = 466,600.08
  5. Step 5: Solve for x
    x = 466,600.08/647.19
  6. Step 6: Final answer
    x = 720.96

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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.