Home / 1,127.11-1,690.70-579.14

Finding the Fourth Proportional to 1,127.11, 1,690.70 and 579.14

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Solution

The fourth proportional to 1,127.11, 1,690.70 and 579.14 is: 868.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.11 : 1,690.70 = 579.14 : x
  2. Step 2: Convert to fraction form
    1,127.11/1,690.70 = 579.14/x
  3. Step 3: Cross multiply
    1,127.11x = 1,690.70 × 579.14
  4. Step 4: Simplify right side
    1,127.11x = 979,152.00
  5. Step 5: Solve for x
    x = 979,152.00/1,127.11
  6. Step 6: Final answer
    x = 868.73

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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.