Home / 628,506.98-867,236.25-395,897.78

Finding the Fourth Proportional to 628,506.98, 867,236.25 and 395,897.78

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Solution

The fourth proportional to 628,506.98, 867,236.25 and 395,897.78 is: 546,273.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,506.98 : 867,236.25 = 395,897.78 : x
  2. Step 2: Convert to fraction form
    628,506.98/867,236.25 = 395,897.78/x
  3. Step 3: Cross multiply
    628,506.98x = 867,236.25 × 395,897.78
  4. Step 4: Simplify right side
    628,506.98x = 343,336,899,794.86
  5. Step 5: Solve for x
    x = 343,336,899,794.86/628,506.98
  6. Step 6: Final answer
    x = 546,273.80

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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.