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Finding the Fourth Proportional to 3,482.68, 4,805.78 and 1,990.55

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Solution

The fourth proportional to 3,482.68, 4,805.78 and 1,990.55 is: 2,746.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,482.68 : 4,805.78 = 1,990.55 : x
  2. Step 2: Convert to fraction form
    3,482.68/4,805.78 = 1,990.55/x
  3. Step 3: Cross multiply
    3,482.68x = 4,805.78 × 1,990.55
  4. Step 4: Simplify right side
    3,482.68x = 9,566,145.12
  5. Step 5: Solve for x
    x = 9,566,145.12/3,482.68
  6. Step 6: Final answer
    x = 2,746.77

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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.