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Finding the Fourth Proportional to 640,555.75, 960,873.24 and 214,129.94

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Solution

The fourth proportional to 640,555.75, 960,873.24 and 214,129.94 is: 321,208.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,555.75 : 960,873.24 = 214,129.94 : x
  2. Step 2: Convert to fraction form
    640,555.75/960,873.24 = 214,129.94/x
  3. Step 3: Cross multiply
    640,555.75x = 960,873.24 × 214,129.94
  4. Step 4: Simplify right side
    640,555.75x = 205,751,729,228.81
  5. Step 5: Solve for x
    x = 205,751,729,228.81/640,555.75
  6. Step 6: Final answer
    x = 321,208.16

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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.