Home / 428,690.62-642,904.55-296,420.86

Finding the Fourth Proportional to 428,690.62, 642,904.55 and 296,420.86

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Solution

The fourth proportional to 428,690.62, 642,904.55 and 296,420.86 is: 444,540.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,690.62 : 642,904.55 = 296,420.86 : x
  2. Step 2: Convert to fraction form
    428,690.62/642,904.55 = 296,420.86/x
  3. Step 3: Cross multiply
    428,690.62x = 642,904.55 × 296,420.86
  4. Step 4: Simplify right side
    428,690.62x = 190,570,319,608.91
  5. Step 5: Solve for x
    x = 190,570,319,608.91/428,690.62
  6. Step 6: Final answer
    x = 444,540.45

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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.