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Finding the Fourth Proportional to 2,817, 3,887.40 and 1,557.99

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Solution

The fourth proportional to 2,817, 3,887.40 and 1,557.99 is: 2,149.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817 : 3,887.40 = 1,557.99 : x
  2. Step 2: Convert to fraction form
    2,817/3,887.40 = 1,557.99/x
  3. Step 3: Cross multiply
    2,817x = 3,887.40 × 1,557.99
  4. Step 4: Simplify right side
    2,817x = 6,056,530.33
  5. Step 5: Solve for x
    x = 6,056,530.33/2,817
  6. Step 6: Final answer
    x = 2,149.99

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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.