Home / 1,311.25-1,966.92-445.63

Finding the Fourth Proportional to 1,311.25, 1,966.92 and 445.63

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Solution

The fourth proportional to 1,311.25, 1,966.92 and 445.63 is: 668.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.25 : 1,966.92 = 445.63 : x
  2. Step 2: Convert to fraction form
    1,311.25/1,966.92 = 445.63/x
  3. Step 3: Cross multiply
    1,311.25x = 1,966.92 × 445.63
  4. Step 4: Simplify right side
    1,311.25x = 876,518.56
  5. Step 5: Solve for x
    x = 876,518.56/1,311.25
  6. Step 6: Final answer
    x = 668.46

Related Problems

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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.