Home / 2,990.87-4,484.51-1,142.12

Finding the Fourth Proportional to 2,990.87, 4,484.51 and 1,142.12

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Solution

The fourth proportional to 2,990.87, 4,484.51 and 1,142.12 is: 1,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.87 : 4,484.51 = 1,142.12 : x
  2. Step 2: Convert to fraction form
    2,990.87/4,484.51 = 1,142.12/x
  3. Step 3: Cross multiply
    2,990.87x = 4,484.51 × 1,142.12
  4. Step 4: Simplify right side
    2,990.87x = 5,121,854.06
  5. Step 5: Solve for x
    x = 5,121,854.06/2,990.87
  6. Step 6: Final answer
    x = 1,712.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.