Home / 1,129.44-1,558.23-631.98

Finding the Fourth Proportional to 1,129.44, 1,558.23 and 631.98

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Solution

The fourth proportional to 1,129.44, 1,558.23 and 631.98 is: 871.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.44 : 1,558.23 = 631.98 : x
  2. Step 2: Convert to fraction form
    1,129.44/1,558.23 = 631.98/x
  3. Step 3: Cross multiply
    1,129.44x = 1,558.23 × 631.98
  4. Step 4: Simplify right side
    1,129.44x = 984,770.20
  5. Step 5: Solve for x
    x = 984,770.20/1,129.44
  6. Step 6: Final answer
    x = 871.91

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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.