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Finding the Fourth Proportional to 3,985.79, 5,989.62 and 3,759.35

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Solution

The fourth proportional to 3,985.79, 5,989.62 and 3,759.35 is: 5,649.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.79 : 5,989.62 = 3,759.35 : x
  2. Step 2: Convert to fraction form
    3,985.79/5,989.62 = 3,759.35/x
  3. Step 3: Cross multiply
    3,985.79x = 5,989.62 × 3,759.35
  4. Step 4: Simplify right side
    3,985.79x = 22,517,048.00
  5. Step 5: Solve for x
    x = 22,517,048.00/3,985.79
  6. Step 6: Final answer
    x = 5,649.34

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1.5x scale

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.