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Finding the Fourth Proportional to 535.72, 736.78 and 429.56

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Solution

The fourth proportional to 535.72, 736.78 and 429.56 is: 590.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.72 : 736.78 = 429.56 : x
  2. Step 2: Convert to fraction form
    535.72/736.78 = 429.56/x
  3. Step 3: Cross multiply
    535.72x = 736.78 × 429.56
  4. Step 4: Simplify right side
    535.72x = 316,491.22
  5. Step 5: Solve for x
    x = 316,491.22/535.72
  6. Step 6: Final answer
    x = 590.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.