Home / 1,480.24-2,220.56-821.62

Finding the Fourth Proportional to 1,480.24, 2,220.56 and 821.62

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Solution

The fourth proportional to 1,480.24, 2,220.56 and 821.62 is: 1,232.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.24 : 2,220.56 = 821.62 : x
  2. Step 2: Convert to fraction form
    1,480.24/2,220.56 = 821.62/x
  3. Step 3: Cross multiply
    1,480.24x = 2,220.56 × 821.62
  4. Step 4: Simplify right side
    1,480.24x = 1,824,456.51
  5. Step 5: Solve for x
    x = 1,824,456.51/1,480.24
  6. Step 6: Final answer
    x = 1,232.54

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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.