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Finding the Fourth Proportional to 640,433.88, 960,704.82 and 191,125.80

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Solution

The fourth proportional to 640,433.88, 960,704.82 and 191,125.80 is: 286,704.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,433.88 : 960,704.82 = 191,125.80 : x
  2. Step 2: Convert to fraction form
    640,433.88/960,704.82 = 191,125.80/x
  3. Step 3: Cross multiply
    640,433.88x = 960,704.82 × 191,125.80
  4. Step 4: Simplify right side
    640,433.88x = 183,615,477,286.36
  5. Step 5: Solve for x
    x = 183,615,477,286.36/640,433.88
  6. Step 6: Final answer
    x = 286,704.82

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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.