Home / 2,079.04-3,117.60-780.16

Finding the Fourth Proportional to 2,079.04, 3,117.60 and 780.16

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Solution

The fourth proportional to 2,079.04, 3,117.60 and 780.16 is: 1,169.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.04 : 3,117.60 = 780.16 : x
  2. Step 2: Convert to fraction form
    2,079.04/3,117.60 = 780.16/x
  3. Step 3: Cross multiply
    2,079.04x = 3,117.60 × 780.16
  4. Step 4: Simplify right side
    2,079.04x = 2,432,226.82
  5. Step 5: Solve for x
    x = 2,432,226.82/2,079.04
  6. Step 6: Final answer
    x = 1,169.88

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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.