Home / 428,109.17-591,187.77-320,492.34

Finding the Fourth Proportional to 428,109.17, 591,187.77 and 320,492.34

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Solution

The fourth proportional to 428,109.17, 591,187.77 and 320,492.34 is: 442,576.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,109.17 : 591,187.77 = 320,492.34 : x
  2. Step 2: Convert to fraction form
    428,109.17/591,187.77 = 320,492.34/x
  3. Step 3: Cross multiply
    428,109.17x = 591,187.77 × 320,492.34
  4. Step 4: Simplify right side
    428,109.17x = 189,471,151,786.68
  5. Step 5: Solve for x
    x = 189,471,151,786.68/428,109.17
  6. Step 6: Final answer
    x = 442,576.72

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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.