Home / 3,987.39-5,502.47-2,219.07

Finding the Fourth Proportional to 3,987.39, 5,502.47 and 2,219.07

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Solution

The fourth proportional to 3,987.39, 5,502.47 and 2,219.07 is: 3,062.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.39 : 5,502.47 = 2,219.07 : x
  2. Step 2: Convert to fraction form
    3,987.39/5,502.47 = 2,219.07/x
  3. Step 3: Cross multiply
    3,987.39x = 5,502.47 × 2,219.07
  4. Step 4: Simplify right side
    3,987.39x = 12,210,355.01
  5. Step 5: Solve for x
    x = 12,210,355.01/3,987.39
  6. Step 6: Final answer
    x = 3,062.24

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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.