Home / 426,207.47-639,287.82-257,682.56

Finding the Fourth Proportional to 426,207.47, 639,287.82 and 257,682.56

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Solution

The fourth proportional to 426,207.47, 639,287.82 and 257,682.56 is: 386,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,207.47 : 639,287.82 = 257,682.56 : x
  2. Step 2: Convert to fraction form
    426,207.47/639,287.82 = 257,682.56/x
  3. Step 3: Cross multiply
    426,207.47x = 639,287.82 × 257,682.56
  4. Step 4: Simplify right side
    426,207.47x = 164,733,318,837.98
  5. Step 5: Solve for x
    x = 164,733,318,837.98/426,207.47
  6. Step 6: Final answer
    x = 386,509.70

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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.