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Finding the Fourth Proportional to 5,781.18, 7,977.18 and 3,390.25

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Solution

The fourth proportional to 5,781.18, 7,977.18 and 3,390.25 is: 4,678.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,781.18 : 7,977.18 = 3,390.25 : x
  2. Step 2: Convert to fraction form
    5,781.18/7,977.18 = 3,390.25/x
  3. Step 3: Cross multiply
    5,781.18x = 7,977.18 × 3,390.25
  4. Step 4: Simplify right side
    5,781.18x = 27,044,652.01
  5. Step 5: Solve for x
    x = 27,044,652.01/5,781.18
  6. Step 6: Final answer
    x = 4,678.05

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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.