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Finding the Fourth Proportional to 640,843.05, 961,475.01 and 262,082.33

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Solution

The fourth proportional to 640,843.05, 961,475.01 and 262,082.33 is: 393,209.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,843.05 : 961,475.01 = 262,082.33 : x
  2. Step 2: Convert to fraction form
    640,843.05/961,475.01 = 262,082.33/x
  3. Step 3: Cross multiply
    640,843.05x = 961,475.01 × 262,082.33
  4. Step 4: Simplify right side
    640,843.05x = 251,985,606,050.20
  5. Step 5: Solve for x
    x = 251,985,606,050.20/640,843.05
  6. Step 6: Final answer
    x = 393,209.55

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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.