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Finding the Fourth Proportional to 2,891.58, 3,990.42 and 1,756.92

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Solution

The fourth proportional to 2,891.58, 3,990.42 and 1,756.92 is: 2,424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,891.58 : 3,990.42 = 1,756.92 : x
  2. Step 2: Convert to fraction form
    2,891.58/3,990.42 = 1,756.92/x
  3. Step 3: Cross multiply
    2,891.58x = 3,990.42 × 1,756.92
  4. Step 4: Simplify right side
    2,891.58x = 7,010,848.71
  5. Step 5: Solve for x
    x = 7,010,848.71/2,891.58
  6. Step 6: Final answer
    x = 2,424.57

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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.