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Finding the Fourth Proportional to 3,695.95, 5,545 and 1,387.63

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Solution

The fourth proportional to 3,695.95, 5,545 and 1,387.63 is: 2,081.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,695.95 : 5,545 = 1,387.63 : x
  2. Step 2: Convert to fraction form
    3,695.95/5,545 = 1,387.63/x
  3. Step 3: Cross multiply
    3,695.95x = 5,545 × 1,387.63
  4. Step 4: Simplify right side
    3,695.95x = 7,694,380.63
  5. Step 5: Solve for x
    x = 7,694,380.63/3,695.95
  6. Step 6: Final answer
    x = 2,081.84

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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.