Home / 428,109.67-591,188.46-320,492.84

Finding the Fourth Proportional to 428,109.67, 591,188.46 and 320,492.84

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Solution

The fourth proportional to 428,109.67, 591,188.46 and 320,492.84 is: 442,577.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,109.67 : 591,188.46 = 320,492.84 : x
  2. Step 2: Convert to fraction form
    428,109.67/591,188.46 = 320,492.84/x
  3. Step 3: Cross multiply
    428,109.67x = 591,188.46 × 320,492.84
  4. Step 4: Simplify right side
    428,109.67x = 189,471,668,520.63
  5. Step 5: Solve for x
    x = 189,471,668,520.63/428,109.67
  6. Step 6: Final answer
    x = 442,577.41

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1.5x scale

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.