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Finding the Fourth Proportional to 880.97, 1,320.46 and 418.11

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Solution

The fourth proportional to 880.97, 1,320.46 and 418.11 is: 626.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.97 : 1,320.46 = 418.11 : x
  2. Step 2: Convert to fraction form
    880.97/1,320.46 = 418.11/x
  3. Step 3: Cross multiply
    880.97x = 1,320.46 × 418.11
  4. Step 4: Simplify right side
    880.97x = 552,090.93
  5. Step 5: Solve for x
    x = 552,090.93/880.97
  6. Step 6: Final answer
    x = 626.69

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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.