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Finding the Fourth Proportional to 844.39, 1,165.35 and 634.20

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Solution

The fourth proportional to 844.39, 1,165.35 and 634.20 is: 875.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    844.39 : 1,165.35 = 634.20 : x
  2. Step 2: Convert to fraction form
    844.39/1,165.35 = 634.20/x
  3. Step 3: Cross multiply
    844.39x = 1,165.35 × 634.20
  4. Step 4: Simplify right side
    844.39x = 739,062.98
  5. Step 5: Solve for x
    x = 739,062.98/844.39
  6. Step 6: Final answer
    x = 875.26

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Half scale
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Double scale
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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.