Home / 1,247.27-1,872.06-631.41

Finding the Fourth Proportional to 1,247.27, 1,872.06 and 631.41

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Solution

The fourth proportional to 1,247.27, 1,872.06 and 631.41 is: 947.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.27 : 1,872.06 = 631.41 : x
  2. Step 2: Convert to fraction form
    1,247.27/1,872.06 = 631.41/x
  3. Step 3: Cross multiply
    1,247.27x = 1,872.06 × 631.41
  4. Step 4: Simplify right side
    1,247.27x = 1,182,037.40
  5. Step 5: Solve for x
    x = 1,182,037.40/1,247.27
  6. Step 6: Final answer
    x = 947.70

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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.