Home / 426,530.82-639,730.62-142,226.31

Finding the Fourth Proportional to 426,530.82, 639,730.62 and 142,226.31

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Solution

The fourth proportional to 426,530.82, 639,730.62 and 142,226.31 is: 213,317.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,530.82 : 639,730.62 = 142,226.31 : x
  2. Step 2: Convert to fraction form
    426,530.82/639,730.62 = 142,226.31/x
  3. Step 3: Cross multiply
    426,530.82x = 639,730.62 × 142,226.31
  4. Step 4: Simplify right side
    426,530.82x = 90,986,525,476.61
  5. Step 5: Solve for x
    x = 90,986,525,476.61/426,530.82
  6. Step 6: Final answer
    x = 213,317.59

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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.