Home / 1,568.24-2,165.08-979.08

Finding the Fourth Proportional to 1,568.24, 2,165.08 and 979.08

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Solution

The fourth proportional to 1,568.24, 2,165.08 and 979.08 is: 1,351.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.24 : 2,165.08 = 979.08 : x
  2. Step 2: Convert to fraction form
    1,568.24/2,165.08 = 979.08/x
  3. Step 3: Cross multiply
    1,568.24x = 2,165.08 × 979.08
  4. Step 4: Simplify right side
    1,568.24x = 2,119,786.53
  5. Step 5: Solve for x
    x = 2,119,786.53/1,568.24
  6. Step 6: Final answer
    x = 1,351.70

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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.