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Finding the Fourth Proportional to 571.55, 855.68 and 353.66

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Solution

The fourth proportional to 571.55, 855.68 and 353.66 is: 529.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.55 : 855.68 = 353.66 : x
  2. Step 2: Convert to fraction form
    571.55/855.68 = 353.66/x
  3. Step 3: Cross multiply
    571.55x = 855.68 × 353.66
  4. Step 4: Simplify right side
    571.55x = 302,613.74
  5. Step 5: Solve for x
    x = 302,613.74/571.55
  6. Step 6: Final answer
    x = 529.47

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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.