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Finding the Fourth Proportional to 628,668.40, 867,682.02 and 356,761.57

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Solution

The fourth proportional to 628,668.40, 867,682.02 and 356,761.57 is: 492,398.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,668.40 : 867,682.02 = 356,761.57 : x
  2. Step 2: Convert to fraction form
    628,668.40/867,682.02 = 356,761.57/x
  3. Step 3: Cross multiply
    628,668.40x = 867,682.02 × 356,761.57
  4. Step 4: Simplify right side
    628,668.40x = 309,555,599,715.97
  5. Step 5: Solve for x
    x = 309,555,599,715.97/628,668.40
  6. Step 6: Final answer
    x = 492,398.85

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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.