Home / 1,480.25-2,220.74-440.21

Finding the Fourth Proportional to 1,480.25, 2,220.74 and 440.21

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Solution

The fourth proportional to 1,480.25, 2,220.74 and 440.21 is: 660.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.25 : 2,220.74 = 440.21 : x
  2. Step 2: Convert to fraction form
    1,480.25/2,220.74 = 440.21/x
  3. Step 3: Cross multiply
    1,480.25x = 2,220.74 × 440.21
  4. Step 4: Simplify right side
    1,480.25x = 977,591.96
  5. Step 5: Solve for x
    x = 977,591.96/1,480.25
  6. Step 6: Final answer
    x = 660.42

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Double scale
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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.