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Finding the Fourth Proportional to 1,230.77, 1,846.09 and 743.69

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Solution

The fourth proportional to 1,230.77, 1,846.09 and 743.69 is: 1,115.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230.77 : 1,846.09 = 743.69 : x
  2. Step 2: Convert to fraction form
    1,230.77/1,846.09 = 743.69/x
  3. Step 3: Cross multiply
    1,230.77x = 1,846.09 × 743.69
  4. Step 4: Simplify right side
    1,230.77x = 1,372,918.67
  5. Step 5: Solve for x
    x = 1,372,918.67/1,230.77
  6. Step 6: Final answer
    x = 1,115.50

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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.