Home / 2,215.47-3,057.49-1,220.75

Finding the Fourth Proportional to 2,215.47, 3,057.49 and 1,220.75

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Solution

The fourth proportional to 2,215.47, 3,057.49 and 1,220.75 is: 1,684.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.47 : 3,057.49 = 1,220.75 : x
  2. Step 2: Convert to fraction form
    2,215.47/3,057.49 = 1,220.75/x
  3. Step 3: Cross multiply
    2,215.47x = 3,057.49 × 1,220.75
  4. Step 4: Simplify right side
    2,215.47x = 3,732,430.92
  5. Step 5: Solve for x
    x = 3,732,430.92/2,215.47
  6. Step 6: Final answer
    x = 1,684.71

Related Problems

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Half scale
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Double scale
Find fourth proportional to 2,216.47, 3,058.87 and 1,221.75
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.