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Finding the Fourth Proportional to 801.82, 1,105.59 and 653.99

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Solution

The fourth proportional to 801.82, 1,105.59 and 653.99 is: 901.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.82 : 1,105.59 = 653.99 : x
  2. Step 2: Convert to fraction form
    801.82/1,105.59 = 653.99/x
  3. Step 3: Cross multiply
    801.82x = 1,105.59 × 653.99
  4. Step 4: Simplify right side
    801.82x = 723,044.80
  5. Step 5: Solve for x
    x = 723,044.80/801.82
  6. Step 6: Final answer
    x = 901.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.