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Finding the Fourth Proportional to 536.38, 803.40 and 261.89

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Solution

The fourth proportional to 536.38, 803.40 and 261.89 is: 392.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.38 : 803.40 = 261.89 : x
  2. Step 2: Convert to fraction form
    536.38/803.40 = 261.89/x
  3. Step 3: Cross multiply
    536.38x = 803.40 × 261.89
  4. Step 4: Simplify right side
    536.38x = 210,402.43
  5. Step 5: Solve for x
    x = 210,402.43/536.38
  6. Step 6: Final answer
    x = 392.26

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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.