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Finding the Fourth Proportional to 880.74, 1,321.30 and 264.40

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Solution

The fourth proportional to 880.74, 1,321.30 and 264.40 is: 396.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.74 : 1,321.30 = 264.40 : x
  2. Step 2: Convert to fraction form
    880.74/1,321.30 = 264.40/x
  3. Step 3: Cross multiply
    880.74x = 1,321.30 × 264.40
  4. Step 4: Simplify right side
    880.74x = 349,351.72
  5. Step 5: Solve for x
    x = 349,351.72/880.74
  6. Step 6: Final answer
    x = 396.66

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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.