Home / 428,039.57-642,101.82-158,238.40

Finding the Fourth Proportional to 428,039.57, 642,101.82 and 158,238.40

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Solution

The fourth proportional to 428,039.57, 642,101.82 and 158,238.40 is: 237,373.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,039.57 : 642,101.82 = 158,238.40 : x
  2. Step 2: Convert to fraction form
    428,039.57/642,101.82 = 158,238.40/x
  3. Step 3: Cross multiply
    428,039.57x = 642,101.82 × 158,238.40
  4. Step 4: Simplify right side
    428,039.57x = 101,605,163,028.63
  5. Step 5: Solve for x
    x = 101,605,163,028.63/428,039.57
  6. Step 6: Final answer
    x = 237,373.29

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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.