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Finding the Fourth Proportional to 535.59, 803.48 and 261.66

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Solution

The fourth proportional to 535.59, 803.48 and 261.66 is: 392.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.59 : 803.48 = 261.66 : x
  2. Step 2: Convert to fraction form
    535.59/803.48 = 261.66/x
  3. Step 3: Cross multiply
    535.59x = 803.48 × 261.66
  4. Step 4: Simplify right side
    535.59x = 210,238.58
  5. Step 5: Solve for x
    x = 210,238.58/535.59
  6. Step 6: Final answer
    x = 392.54

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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.