Home / 640,799.10-961,285.05-220,203.90

Finding the Fourth Proportional to 640,799.10, 961,285.05 and 220,203.90

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Solution

The fourth proportional to 640,799.10, 961,285.05 and 220,203.90 is: 330,335.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,799.10 : 961,285.05 = 220,203.90 : x
  2. Step 2: Convert to fraction form
    640,799.10/961,285.05 = 220,203.90/x
  3. Step 3: Cross multiply
    640,799.10x = 961,285.05 × 220,203.90
  4. Step 4: Simplify right side
    640,799.10x = 211,678,717,021.70
  5. Step 5: Solve for x
    x = 211,678,717,021.70/640,799.10
  6. Step 6: Final answer
    x = 330,335.54

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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.