Home / 1,114.14-1,671.24-383.78

Finding the Fourth Proportional to 1,114.14, 1,671.24 and 383.78

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Solution

The fourth proportional to 1,114.14, 1,671.24 and 383.78 is: 575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.14 : 1,671.24 = 383.78 : x
  2. Step 2: Convert to fraction form
    1,114.14/1,671.24 = 383.78/x
  3. Step 3: Cross multiply
    1,114.14x = 1,671.24 × 383.78
  4. Step 4: Simplify right side
    1,114.14x = 641,388.49
  5. Step 5: Solve for x
    x = 641,388.49/1,114.14
  6. Step 6: Final answer
    x = 575.68

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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.