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Finding the Fourth Proportional to 535.78, 803.58 and 211.06

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Solution

The fourth proportional to 535.78, 803.58 and 211.06 is: 316.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.78 : 803.58 = 211.06 : x
  2. Step 2: Convert to fraction form
    535.78/803.58 = 211.06/x
  3. Step 3: Cross multiply
    535.78x = 803.58 × 211.06
  4. Step 4: Simplify right side
    535.78x = 169,603.59
  5. Step 5: Solve for x
    x = 169,603.59/535.78
  6. Step 6: Final answer
    x = 316.55

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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.