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Finding the Fourth Proportional to 561, 840.49 and 235.79

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Solution

The fourth proportional to 561, 840.49 and 235.79 is: 353.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    561 : 840.49 = 235.79 : x
  2. Step 2: Convert to fraction form
    561/840.49 = 235.79/x
  3. Step 3: Cross multiply
    561x = 840.49 × 235.79
  4. Step 4: Simplify right side
    561x = 198,179.14
  5. Step 5: Solve for x
    x = 198,179.14/561
  6. Step 6: Final answer
    x = 353.26

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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.