Home / 1,118.25-1,676.80-424.39

Finding the Fourth Proportional to 1,118.25, 1,676.80 and 424.39

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Solution

The fourth proportional to 1,118.25, 1,676.80 and 424.39 is: 636.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.25 : 1,676.80 = 424.39 : x
  2. Step 2: Convert to fraction form
    1,118.25/1,676.80 = 424.39/x
  3. Step 3: Cross multiply
    1,118.25x = 1,676.80 × 424.39
  4. Step 4: Simplify right side
    1,118.25x = 711,610.72
  5. Step 5: Solve for x
    x = 711,610.72/1,118.25
  6. Step 6: Final answer
    x = 636.36

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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.