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Finding the Fourth Proportional to 3,990.66, 5,973.60 and 3,400.17

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Solution

The fourth proportional to 3,990.66, 5,973.60 and 3,400.17 is: 5,089.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.66 : 5,973.60 = 3,400.17 : x
  2. Step 2: Convert to fraction form
    3,990.66/5,973.60 = 3,400.17/x
  3. Step 3: Cross multiply
    3,990.66x = 5,973.60 × 3,400.17
  4. Step 4: Simplify right side
    3,990.66x = 20,311,255.51
  5. Step 5: Solve for x
    x = 20,311,255.51/3,990.66
  6. Step 6: Final answer
    x = 5,089.70

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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.