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Finding the Fourth Proportional to 640,255.86, 960,383.82 and 219,535.38

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Solution

The fourth proportional to 640,255.86, 960,383.82 and 219,535.38 is: 329,303.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,255.86 : 960,383.82 = 219,535.38 : x
  2. Step 2: Convert to fraction form
    640,255.86/960,383.82 = 219,535.38/x
  3. Step 3: Cross multiply
    640,255.86x = 960,383.82 × 219,535.38
  4. Step 4: Simplify right side
    640,255.86x = 210,838,226,869.55
  5. Step 5: Solve for x
    x = 210,838,226,869.55/640,255.86
  6. Step 6: Final answer
    x = 329,303.08

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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.