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Finding the Fourth Proportional to 640,987.88, 960,694.47 and 359,914.64

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Solution

The fourth proportional to 640,987.88, 960,694.47 and 359,914.64 is: 539,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,987.88 : 960,694.47 = 359,914.64 : x
  2. Step 2: Convert to fraction form
    640,987.88/960,694.47 = 359,914.64/x
  3. Step 3: Cross multiply
    640,987.88x = 960,694.47 × 359,914.64
  4. Step 4: Simplify right side
    640,987.88x = 345,768,004,320.04
  5. Step 5: Solve for x
    x = 345,768,004,320.04/640,987.88
  6. Step 6: Final answer
    x = 539,429.86

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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.