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Finding the Fourth Proportional to 640,221.30, 960,380.55 and 190,907.01

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Solution

The fourth proportional to 640,221.30, 960,380.55 and 190,907.01 is: 286,375.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,221.30 : 960,380.55 = 190,907.01 : x
  2. Step 2: Convert to fraction form
    640,221.30/960,380.55 = 190,907.01/x
  3. Step 3: Cross multiply
    640,221.30x = 960,380.55 × 190,907.01
  4. Step 4: Simplify right side
    640,221.30x = 183,343,379,262.66
  5. Step 5: Solve for x
    x = 183,343,379,262.66/640,221.30
  6. Step 6: Final answer
    x = 286,375.01

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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.