Home / 1,127.13-1,690.68-305.48

Finding the Fourth Proportional to 1,127.13, 1,690.68 and 305.48

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Solution

The fourth proportional to 1,127.13, 1,690.68 and 305.48 is: 458.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.13 : 1,690.68 = 305.48 : x
  2. Step 2: Convert to fraction form
    1,127.13/1,690.68 = 305.48/x
  3. Step 3: Cross multiply
    1,127.13x = 1,690.68 × 305.48
  4. Step 4: Simplify right side
    1,127.13x = 516,468.93
  5. Step 5: Solve for x
    x = 516,468.93/1,127.13
  6. Step 6: Final answer
    x = 458.22

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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.