Home / 1,220.30-1,830.80-440.49

Finding the Fourth Proportional to 1,220.30, 1,830.80 and 440.49

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Solution

The fourth proportional to 1,220.30, 1,830.80 and 440.49 is: 660.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.30 : 1,830.80 = 440.49 : x
  2. Step 2: Convert to fraction form
    1,220.30/1,830.80 = 440.49/x
  3. Step 3: Cross multiply
    1,220.30x = 1,830.80 × 440.49
  4. Step 4: Simplify right side
    1,220.30x = 806,449.09
  5. Step 5: Solve for x
    x = 806,449.09/1,220.30
  6. Step 6: Final answer
    x = 660.86

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.