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Finding the Fourth Proportional to 617.22, 926.64 and 521.64

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Solution

The fourth proportional to 617.22, 926.64 and 521.64 is: 783.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.22 : 926.64 = 521.64 : x
  2. Step 2: Convert to fraction form
    617.22/926.64 = 521.64/x
  3. Step 3: Cross multiply
    617.22x = 926.64 × 521.64
  4. Step 4: Simplify right side
    617.22x = 483,372.49
  5. Step 5: Solve for x
    x = 483,372.49/617.22
  6. Step 6: Final answer
    x = 783.14

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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.