Home / 1,126.24-1,688.20-663.93

Finding the Fourth Proportional to 1,126.24, 1,688.20 and 663.93

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Solution

The fourth proportional to 1,126.24, 1,688.20 and 663.93 is: 995.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,126.24 : 1,688.20 = 663.93 : x
  2. Step 2: Convert to fraction form
    1,126.24/1,688.20 = 663.93/x
  3. Step 3: Cross multiply
    1,126.24x = 1,688.20 × 663.93
  4. Step 4: Simplify right side
    1,126.24x = 1,120,844.97
  5. Step 5: Solve for x
    x = 1,120,844.97/1,126.24
  6. Step 6: Final answer
    x = 995.21

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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.