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Finding the Fourth Proportional to 561.65, 842.51 and 269.28

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Solution

The fourth proportional to 561.65, 842.51 and 269.28 is: 403.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    561.65 : 842.51 = 269.28 : x
  2. Step 2: Convert to fraction form
    561.65/842.51 = 269.28/x
  3. Step 3: Cross multiply
    561.65x = 842.51 × 269.28
  4. Step 4: Simplify right side
    561.65x = 226,871.77
  5. Step 5: Solve for x
    x = 226,871.77/561.65
  6. Step 6: Final answer
    x = 403.94

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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.