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Finding the Fourth Proportional to 1,771.38, 2,444.49 and 985.44

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Solution

The fourth proportional to 1,771.38, 2,444.49 and 985.44 is: 1,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,771.38 : 2,444.49 = 985.44 : x
  2. Step 2: Convert to fraction form
    1,771.38/2,444.49 = 985.44/x
  3. Step 3: Cross multiply
    1,771.38x = 2,444.49 × 985.44
  4. Step 4: Simplify right side
    1,771.38x = 2,408,898.23
  5. Step 5: Solve for x
    x = 2,408,898.23/1,771.38
  6. Step 6: Final answer
    x = 1,359.90

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Half scale
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Double scale
Find fourth proportional to 1,772.38, 2,445.87 and 986.44
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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.