Home / 1,638.28-2,262.54-1,416.16

Finding the Fourth Proportional to 1,638.28, 2,262.54 and 1,416.16

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Solution

The fourth proportional to 1,638.28, 2,262.54 and 1,416.16 is: 1,955.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.28 : 2,262.54 = 1,416.16 : x
  2. Step 2: Convert to fraction form
    1,638.28/2,262.54 = 1,416.16/x
  3. Step 3: Cross multiply
    1,638.28x = 2,262.54 × 1,416.16
  4. Step 4: Simplify right side
    1,638.28x = 3,204,118.65
  5. Step 5: Solve for x
    x = 3,204,118.65/1,638.28
  6. Step 6: Final answer
    x = 1,955.78

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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.