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Finding the Fourth Proportional to 640,081.90, 960,595.29 and 303,121.90

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Solution

The fourth proportional to 640,081.90, 960,595.29 and 303,121.90 is: 454,906.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,081.90 : 960,595.29 = 303,121.90 : x
  2. Step 2: Convert to fraction form
    640,081.90/960,595.29 = 303,121.90/x
  3. Step 3: Cross multiply
    640,081.90x = 960,595.29 × 303,121.90
  4. Step 4: Simplify right side
    640,081.90x = 291,177,470,636.60
  5. Step 5: Solve for x
    x = 291,177,470,636.60/640,081.90
  6. Step 6: Final answer
    x = 454,906.58

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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.