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Finding the Fourth Proportional to 5,078.84, 7,008.81 and 2,840.81

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Solution

The fourth proportional to 5,078.84, 7,008.81 and 2,840.81 is: 3,920.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,078.84 : 7,008.81 = 2,840.81 : x
  2. Step 2: Convert to fraction form
    5,078.84/7,008.81 = 2,840.81/x
  3. Step 3: Cross multiply
    5,078.84x = 7,008.81 × 2,840.81
  4. Step 4: Simplify right side
    5,078.84x = 19,910,662.49
  5. Step 5: Solve for x
    x = 19,910,662.49/5,078.84
  6. Step 6: Final answer
    x = 3,920.32

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1.5x scale

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.