Home / 628,152.12-867,003.89-356,379.09

Finding the Fourth Proportional to 628,152.12, 867,003.89 and 356,379.09

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Solution

The fourth proportional to 628,152.12, 867,003.89 and 356,379.09 is: 491,890.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,152.12 : 867,003.89 = 356,379.09 : x
  2. Step 2: Convert to fraction form
    628,152.12/867,003.89 = 356,379.09/x
  3. Step 3: Cross multiply
    628,152.12x = 867,003.89 × 356,379.09
  4. Step 4: Simplify right side
    628,152.12x = 308,982,051,227.75
  5. Step 5: Solve for x
    x = 308,982,051,227.75/628,152.12
  6. Step 6: Final answer
    x = 491,890.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.