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Finding the Fourth Proportional to 570.11, 855.50 and 261.95

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Solution

The fourth proportional to 570.11, 855.50 and 261.95 is: 393.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    570.11 : 855.50 = 261.95 : x
  2. Step 2: Convert to fraction form
    570.11/855.50 = 261.95/x
  3. Step 3: Cross multiply
    570.11x = 855.50 × 261.95
  4. Step 4: Simplify right side
    570.11x = 224,092.64
  5. Step 5: Solve for x
    x = 224,092.64/570.11
  6. Step 6: Final answer
    x = 393.07

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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.