Home / 1,129.22-1,558.33-631.86

Finding the Fourth Proportional to 1,129.22, 1,558.33 and 631.86

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Solution

The fourth proportional to 1,129.22, 1,558.33 and 631.86 is: 871.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.22 : 1,558.33 = 631.86 : x
  2. Step 2: Convert to fraction form
    1,129.22/1,558.33 = 631.86/x
  3. Step 3: Cross multiply
    1,129.22x = 1,558.33 × 631.86
  4. Step 4: Simplify right side
    1,129.22x = 984,646.39
  5. Step 5: Solve for x
    x = 984,646.39/1,129.22
  6. Step 6: Final answer
    x = 871.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.