Home / 428,101.28-591,176.87-320,484.47

Finding the Fourth Proportional to 428,101.28, 591,176.87 and 320,484.47

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Solution

The fourth proportional to 428,101.28, 591,176.87 and 320,484.47 is: 442,565.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,101.28 : 591,176.87 = 320,484.47 : x
  2. Step 2: Convert to fraction form
    428,101.28/591,176.87 = 320,484.47/x
  3. Step 3: Cross multiply
    428,101.28x = 591,176.87 × 320,484.47
  4. Step 4: Simplify right side
    428,101.28x = 189,463,001,299.90
  5. Step 5: Solve for x
    x = 189,463,001,299.90/428,101.28
  6. Step 6: Final answer
    x = 442,565.84

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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.