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Finding the Fourth Proportional to 5,778.80, 7,973.16 and 3,681.20

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Solution

The fourth proportional to 5,778.80, 7,973.16 and 3,681.20 is: 5,079.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,778.80 : 7,973.16 = 3,681.20 : x
  2. Step 2: Convert to fraction form
    5,778.80/7,973.16 = 3,681.20/x
  3. Step 3: Cross multiply
    5,778.80x = 7,973.16 × 3,681.20
  4. Step 4: Simplify right side
    5,778.80x = 29,350,796.59
  5. Step 5: Solve for x
    x = 29,350,796.59/5,778.80
  6. Step 6: Final answer
    x = 5,079.05

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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.