Home / 5,079.80-7,619.90-1,792.42

Finding the Fourth Proportional to 5,079.80, 7,619.90 and 1,792.42

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Solution

The fourth proportional to 5,079.80, 7,619.90 and 1,792.42 is: 2,688.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,079.80 : 7,619.90 = 1,792.42 : x
  2. Step 2: Convert to fraction form
    5,079.80/7,619.90 = 1,792.42/x
  3. Step 3: Cross multiply
    5,079.80x = 7,619.90 × 1,792.42
  4. Step 4: Simplify right side
    5,079.80x = 13,658,061.16
  5. Step 5: Solve for x
    x = 13,658,061.16/5,079.80
  6. Step 6: Final answer
    x = 2,688.70

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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.