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Finding the Fourth Proportional to 801.60, 1,106.56 and 506.84

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Solution

The fourth proportional to 801.60, 1,106.56 and 506.84 is: 699.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.60 : 1,106.56 = 506.84 : x
  2. Step 2: Convert to fraction form
    801.60/1,106.56 = 506.84/x
  3. Step 3: Cross multiply
    801.60x = 1,106.56 × 506.84
  4. Step 4: Simplify right side
    801.60x = 560,848.87
  5. Step 5: Solve for x
    x = 560,848.87/801.60
  6. Step 6: Final answer
    x = 699.66

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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.