Home / 2,953.40-4,431.13-1,311.10

Finding the Fourth Proportional to 2,953.40, 4,431.13 and 1,311.10

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Solution

The fourth proportional to 2,953.40, 4,431.13 and 1,311.10 is: 1,967.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,953.40 : 4,431.13 = 1,311.10 : x
  2. Step 2: Convert to fraction form
    2,953.40/4,431.13 = 1,311.10/x
  3. Step 3: Cross multiply
    2,953.40x = 4,431.13 × 1,311.10
  4. Step 4: Simplify right side
    2,953.40x = 5,809,654.54
  5. Step 5: Solve for x
    x = 5,809,654.54/2,953.40
  6. Step 6: Final answer
    x = 1,967.11

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.