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Finding the Fourth Proportional to 3,406.61, 4,700.97 and 1,990.43

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Solution

The fourth proportional to 3,406.61, 4,700.97 and 1,990.43 is: 2,746.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,406.61 : 4,700.97 = 1,990.43 : x
  2. Step 2: Convert to fraction form
    3,406.61/4,700.97 = 1,990.43/x
  3. Step 3: Cross multiply
    3,406.61x = 4,700.97 × 1,990.43
  4. Step 4: Simplify right side
    3,406.61x = 9,356,920.75
  5. Step 5: Solve for x
    x = 9,356,920.75/3,406.61
  6. Step 6: Final answer
    x = 2,746.70

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1.5x scale

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.