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Finding the Fourth Proportional to 534.77, 802.20 and 261.09

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Solution

The fourth proportional to 534.77, 802.20 and 261.09 is: 391.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.77 : 802.20 = 261.09 : x
  2. Step 2: Convert to fraction form
    534.77/802.20 = 261.09/x
  3. Step 3: Cross multiply
    534.77x = 802.20 × 261.09
  4. Step 4: Simplify right side
    534.77x = 209,447.38
  5. Step 5: Solve for x
    x = 209,447.38/534.77
  6. Step 6: Final answer
    x = 391.66

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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.