Home / 1,126.30-1,690.21-395.87

Finding the Fourth Proportional to 1,126.30, 1,690.21 and 395.87

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Solution

The fourth proportional to 1,126.30, 1,690.21 and 395.87 is: 594.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.30 : 1,690.21 = 395.87 : x
  2. Step 2: Convert to fraction form
    1,126.30/1,690.21 = 395.87/x
  3. Step 3: Cross multiply
    1,126.30x = 1,690.21 × 395.87
  4. Step 4: Simplify right side
    1,126.30x = 669,097.23
  5. Step 5: Solve for x
    x = 669,097.23/1,126.30
  6. Step 6: Final answer
    x = 594.07

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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.