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Finding the Fourth Proportional to 825.39, 1,137.54 and 801.70

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Solution

The fourth proportional to 825.39, 1,137.54 and 801.70 is: 1,104.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.39 : 1,137.54 = 801.70 : x
  2. Step 2: Convert to fraction form
    825.39/1,137.54 = 801.70/x
  3. Step 3: Cross multiply
    825.39x = 1,137.54 × 801.70
  4. Step 4: Simplify right side
    825.39x = 911,965.98
  5. Step 5: Solve for x
    x = 911,965.98/825.39
  6. Step 6: Final answer
    x = 1,104.89

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1.5x scale

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.