Home / 1,980.16-2,969.28-1,568.32

Finding the Fourth Proportional to 1,980.16, 2,969.28 and 1,568.32

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Solution

The fourth proportional to 1,980.16, 2,969.28 and 1,568.32 is: 2,351.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.16 : 2,969.28 = 1,568.32 : x
  2. Step 2: Convert to fraction form
    1,980.16/2,969.28 = 1,568.32/x
  3. Step 3: Cross multiply
    1,980.16x = 2,969.28 × 1,568.32
  4. Step 4: Simplify right side
    1,980.16x = 4,656,781.21
  5. Step 5: Solve for x
    x = 4,656,781.21/1,980.16
  6. Step 6: Final answer
    x = 2,351.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.