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Finding the Fourth Proportional to 2,487.15, 3,726.05 and 2,078.91

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Solution

The fourth proportional to 2,487.15, 3,726.05 and 2,078.91 is: 3,114.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.15 : 3,726.05 = 2,078.91 : x
  2. Step 2: Convert to fraction form
    2,487.15/3,726.05 = 2,078.91/x
  3. Step 3: Cross multiply
    2,487.15x = 3,726.05 × 2,078.91
  4. Step 4: Simplify right side
    2,487.15x = 7,746,112.21
  5. Step 5: Solve for x
    x = 7,746,112.21/2,487.15
  6. Step 6: Final answer
    x = 3,114.45

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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.