Home / 1,411.11-2,116.44-486.63

Finding the Fourth Proportional to 1,411.11, 2,116.44 and 486.63

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Solution

The fourth proportional to 1,411.11, 2,116.44 and 486.63 is: 729.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,411.11 : 2,116.44 = 486.63 : x
  2. Step 2: Convert to fraction form
    1,411.11/2,116.44 = 486.63/x
  3. Step 3: Cross multiply
    1,411.11x = 2,116.44 × 486.63
  4. Step 4: Simplify right side
    1,411.11x = 1,029,923.20
  5. Step 5: Solve for x
    x = 1,029,923.20/1,411.11
  6. Step 6: Final answer
    x = 729.87

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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.