Home / 418,961.73-628,434.09-103,421.37

Finding the Fourth Proportional to 418,961.73, 628,434.09 and 103,421.37

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Solution

The fourth proportional to 418,961.73, 628,434.09 and 103,421.37 is: 155,129.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,961.73 : 628,434.09 = 103,421.37 : x
  2. Step 2: Convert to fraction form
    418,961.73/628,434.09 = 103,421.37/x
  3. Step 3: Cross multiply
    418,961.73x = 628,434.09 × 103,421.37
  4. Step 4: Simplify right side
    418,961.73x = 64,993,514,542.50
  5. Step 5: Solve for x
    x = 64,993,514,542.50/418,961.73
  6. Step 6: Final answer
    x = 155,129.96

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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.