Home / 2,218.51-3,061.70-1,287.01

Finding the Fourth Proportional to 2,218.51, 3,061.70 and 1,287.01

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Solution

The fourth proportional to 2,218.51, 3,061.70 and 1,287.01 is: 1,776.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.51 : 3,061.70 = 1,287.01 : x
  2. Step 2: Convert to fraction form
    2,218.51/3,061.70 = 1,287.01/x
  3. Step 3: Cross multiply
    2,218.51x = 3,061.70 × 1,287.01
  4. Step 4: Simplify right side
    2,218.51x = 3,940,432.08
  5. Step 5: Solve for x
    x = 3,940,432.08/2,218.51
  6. Step 6: Final answer
    x = 1,776.16

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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.