Home / 1,122.37-1,683.56-631.91

Finding the Fourth Proportional to 1,122.37, 1,683.56 and 631.91

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Solution

The fourth proportional to 1,122.37, 1,683.56 and 631.91 is: 947.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.37 : 1,683.56 = 631.91 : x
  2. Step 2: Convert to fraction form
    1,122.37/1,683.56 = 631.91/x
  3. Step 3: Cross multiply
    1,122.37x = 1,683.56 × 631.91
  4. Step 4: Simplify right side
    1,122.37x = 1,063,864.19
  5. Step 5: Solve for x
    x = 1,063,864.19/1,122.37
  6. Step 6: Final answer
    x = 947.88

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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.