Home / 1,129.34-1,558.41-631.97

Finding the Fourth Proportional to 1,129.34, 1,558.41 and 631.97

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Solution

The fourth proportional to 1,129.34, 1,558.41 and 631.97 is: 872.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.34 : 1,558.41 = 631.97 : x
  2. Step 2: Convert to fraction form
    1,129.34/1,558.41 = 631.97/x
  3. Step 3: Cross multiply
    1,129.34x = 1,558.41 × 631.97
  4. Step 4: Simplify right side
    1,129.34x = 984,864.05
  5. Step 5: Solve for x
    x = 984,864.05/1,129.34
  6. Step 6: Final answer
    x = 872.07

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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.