Home / 640,836.15-961,308.90-167,520.75

Finding the Fourth Proportional to 640,836.15, 961,308.90 and 167,520.75

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Solution

The fourth proportional to 640,836.15, 961,308.90 and 167,520.75 is: 251,295.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,836.15 : 961,308.90 = 167,520.75 : x
  2. Step 2: Convert to fraction form
    640,836.15/961,308.90 = 167,520.75/x
  3. Step 3: Cross multiply
    640,836.15x = 961,308.90 × 167,520.75
  4. Step 4: Simplify right side
    640,836.15x = 161,039,187,909.68
  5. Step 5: Solve for x
    x = 161,039,187,909.68/640,836.15
  6. Step 6: Final answer
    x = 251,295.42

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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.