Home / 640,943.60-961,156.20-220,002.80

Finding the Fourth Proportional to 640,943.60, 961,156.20 and 220,002.80

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Solution

The fourth proportional to 640,943.60, 961,156.20 and 220,002.80 is: 329,915.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,943.60 : 961,156.20 = 220,002.80 : x
  2. Step 2: Convert to fraction form
    640,943.60/961,156.20 = 220,002.80/x
  3. Step 3: Cross multiply
    640,943.60x = 961,156.20 × 220,002.80
  4. Step 4: Simplify right side
    640,943.60x = 211,457,055,237.36
  5. Step 5: Solve for x
    x = 211,457,055,237.36/640,943.60
  6. Step 6: Final answer
    x = 329,915.23

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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.