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Finding the Fourth Proportional to 3,656.88, 5,487.48 and 1,809

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Solution

The fourth proportional to 3,656.88, 5,487.48 and 1,809 is: 2,714.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,656.88 : 5,487.48 = 1,809 : x
  2. Step 2: Convert to fraction form
    3,656.88/5,487.48 = 1,809/x
  3. Step 3: Cross multiply
    3,656.88x = 5,487.48 × 1,809
  4. Step 4: Simplify right side
    3,656.88x = 9,926,851.32
  5. Step 5: Solve for x
    x = 9,926,851.32/3,656.88
  6. Step 6: Final answer
    x = 2,714.57

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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.