Home / 2,637.28-3,639.90-1,642.78

Finding the Fourth Proportional to 2,637.28, 3,639.90 and 1,642.78

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Solution

The fourth proportional to 2,637.28, 3,639.90 and 1,642.78 is: 2,267.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,637.28 : 3,639.90 = 1,642.78 : x
  2. Step 2: Convert to fraction form
    2,637.28/3,639.90 = 1,642.78/x
  3. Step 3: Cross multiply
    2,637.28x = 3,639.90 × 1,642.78
  4. Step 4: Simplify right side
    2,637.28x = 5,979,554.92
  5. Step 5: Solve for x
    x = 5,979,554.92/2,637.28
  6. Step 6: Final answer
    x = 2,267.32

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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.