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Finding the Fourth Proportional to 3,051.74, 4,208.51 and 1,990.32

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Solution

The fourth proportional to 3,051.74, 4,208.51 and 1,990.32 is: 2,744.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,051.74 : 4,208.51 = 1,990.32 : x
  2. Step 2: Convert to fraction form
    3,051.74/4,208.51 = 1,990.32/x
  3. Step 3: Cross multiply
    3,051.74x = 4,208.51 × 1,990.32
  4. Step 4: Simplify right side
    3,051.74x = 8,376,295.89
  5. Step 5: Solve for x
    x = 8,376,295.89/3,051.74
  6. Step 6: Final answer
    x = 2,744.76

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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.