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Finding the Fourth Proportional to 3,406.51, 4,700.84 and 1,990.33

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Solution

The fourth proportional to 3,406.51, 4,700.84 and 1,990.33 is: 2,746.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,406.51 : 4,700.84 = 1,990.33 : x
  2. Step 2: Convert to fraction form
    3,406.51/4,700.84 = 1,990.33/x
  3. Step 3: Cross multiply
    3,406.51x = 4,700.84 × 1,990.33
  4. Step 4: Simplify right side
    3,406.51x = 9,356,222.53
  5. Step 5: Solve for x
    x = 9,356,222.53/3,406.51
  6. Step 6: Final answer
    x = 2,746.57

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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.