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Finding the Fourth Proportional to 801.88, 1,106.80 and 522.81

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Solution

The fourth proportional to 801.88, 1,106.80 and 522.81 is: 721.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.88 : 1,106.80 = 522.81 : x
  2. Step 2: Convert to fraction form
    801.88/1,106.80 = 522.81/x
  3. Step 3: Cross multiply
    801.88x = 1,106.80 × 522.81
  4. Step 4: Simplify right side
    801.88x = 578,644.80
  5. Step 5: Solve for x
    x = 578,644.80/801.88
  6. Step 6: Final answer
    x = 721.61

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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.