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Finding the Fourth Proportional to 885.83, 1,328.79 and 269.55

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Solution

The fourth proportional to 885.83, 1,328.79 and 269.55 is: 404.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.83 : 1,328.79 = 269.55 : x
  2. Step 2: Convert to fraction form
    885.83/1,328.79 = 269.55/x
  3. Step 3: Cross multiply
    885.83x = 1,328.79 × 269.55
  4. Step 4: Simplify right side
    885.83x = 358,174.00
  5. Step 5: Solve for x
    x = 358,174.00/885.83
  6. Step 6: Final answer
    x = 404.34

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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.