Home / 1,247.47-1,869.57-630.84

Finding the Fourth Proportional to 1,247.47, 1,869.57 and 630.84

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Solution

The fourth proportional to 1,247.47, 1,869.57 and 630.84 is: 945.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,247.47 : 1,869.57 = 630.84 : x
  2. Step 2: Convert to fraction form
    1,247.47/1,869.57 = 630.84/x
  3. Step 3: Cross multiply
    1,247.47x = 1,869.57 × 630.84
  4. Step 4: Simplify right side
    1,247.47x = 1,179,396.03
  5. Step 5: Solve for x
    x = 1,179,396.03/1,247.47
  6. Step 6: Final answer
    x = 945.43

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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.