Home / 428,495.24-643,194.83-418,844.28

Finding the Fourth Proportional to 428,495.24, 643,194.83 and 418,844.28

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Solution

The fourth proportional to 428,495.24, 643,194.83 and 418,844.28 is: 628,708.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,495.24 : 643,194.83 = 418,844.28 : x
  2. Step 2: Convert to fraction form
    428,495.24/643,194.83 = 418,844.28/x
  3. Step 3: Cross multiply
    428,495.24x = 643,194.83 × 418,844.28
  4. Step 4: Simplify right side
    428,495.24x = 269,398,473,376.85
  5. Step 5: Solve for x
    x = 269,398,473,376.85/428,495.24
  6. Step 6: Final answer
    x = 628,708.21

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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.