Home / 426,335.74-639,183.72-257,821.55

Finding the Fourth Proportional to 426,335.74, 639,183.72 and 257,821.55

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Solution

The fourth proportional to 426,335.74, 639,183.72 and 257,821.55 is: 386,538.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,335.74 : 639,183.72 = 257,821.55 : x
  2. Step 2: Convert to fraction form
    426,335.74/639,183.72 = 257,821.55/x
  3. Step 3: Cross multiply
    426,335.74x = 639,183.72 × 257,821.55
  4. Step 4: Simplify right side
    426,335.74x = 164,795,337,593.02
  5. Step 5: Solve for x
    x = 164,795,337,593.02/426,335.74
  6. Step 6: Final answer
    x = 386,538.88

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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.