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Finding the Fourth Proportional to 535.05, 738.47 and 311.02

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Solution

The fourth proportional to 535.05, 738.47 and 311.02 is: 429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.05 : 738.47 = 311.02 : x
  2. Step 2: Convert to fraction form
    535.05/738.47 = 311.02/x
  3. Step 3: Cross multiply
    535.05x = 738.47 × 311.02
  4. Step 4: Simplify right side
    535.05x = 229,677.13
  5. Step 5: Solve for x
    x = 229,677.13/535.05
  6. Step 6: Final answer
    x = 429.26

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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.