Home / 1,127.28-1,690.26-433.74

Finding the Fourth Proportional to 1,127.28, 1,690.26 and 433.74

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Solution

The fourth proportional to 1,127.28, 1,690.26 and 433.74 is: 650.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.28 : 1,690.26 = 433.74 : x
  2. Step 2: Convert to fraction form
    1,127.28/1,690.26 = 433.74/x
  3. Step 3: Cross multiply
    1,127.28x = 1,690.26 × 433.74
  4. Step 4: Simplify right side
    1,127.28x = 733,133.37
  5. Step 5: Solve for x
    x = 733,133.37/1,127.28
  6. Step 6: Final answer
    x = 650.36

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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.