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Finding the Fourth Proportional to 640,119.09, 960,321.60 and 240,763.32

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Solution

The fourth proportional to 640,119.09, 960,321.60 and 240,763.32 is: 361,198.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,119.09 : 960,321.60 = 240,763.32 : x
  2. Step 2: Convert to fraction form
    640,119.09/960,321.60 = 240,763.32/x
  3. Step 3: Cross multiply
    640,119.09x = 960,321.60 × 240,763.32
  4. Step 4: Simplify right side
    640,119.09x = 231,210,216,683.71
  5. Step 5: Solve for x
    x = 231,210,216,683.71/640,119.09
  6. Step 6: Final answer
    x = 361,198.75

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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.