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Finding the Fourth Proportional to 3,985.08, 5,978.04 and 1,646.08

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Solution

The fourth proportional to 3,985.08, 5,978.04 and 1,646.08 is: 2,469.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.08 : 5,978.04 = 1,646.08 : x
  2. Step 2: Convert to fraction form
    3,985.08/5,978.04 = 1,646.08/x
  3. Step 3: Cross multiply
    3,985.08x = 5,978.04 × 1,646.08
  4. Step 4: Simplify right side
    3,985.08x = 9,840,332.08
  5. Step 5: Solve for x
    x = 9,840,332.08/3,985.08
  6. Step 6: Final answer
    x = 2,469.29

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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.