Home / 428,530.44-642,536.38-191,829

Finding the Fourth Proportional to 428,530.44, 642,536.38 and 191,829

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Solution

The fourth proportional to 428,530.44, 642,536.38 and 191,829 is: 287,627.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,530.44 : 642,536.38 = 191,829 : x
  2. Step 2: Convert to fraction form
    428,530.44/642,536.38 = 191,829/x
  3. Step 3: Cross multiply
    428,530.44x = 642,536.38 × 191,829
  4. Step 4: Simplify right side
    428,530.44x = 123,257,111,239.02
  5. Step 5: Solve for x
    x = 123,257,111,239.02/428,530.44
  6. Step 6: Final answer
    x = 287,627.43

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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.