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Finding the Fourth Proportional to 535.74, 803.70 and 211.11

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Solution

The fourth proportional to 535.74, 803.70 and 211.11 is: 316.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.74 : 803.70 = 211.11 : x
  2. Step 2: Convert to fraction form
    535.74/803.70 = 211.11/x
  3. Step 3: Cross multiply
    535.74x = 803.70 × 211.11
  4. Step 4: Simplify right side
    535.74x = 169,669.11
  5. Step 5: Solve for x
    x = 169,669.11/535.74
  6. Step 6: Final answer
    x = 316.70

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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.