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Finding the Fourth Proportional to 640,323.72, 960,259.05 and 280,669.14

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Solution

The fourth proportional to 640,323.72, 960,259.05 and 280,669.14 is: 420,904.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,323.72 : 960,259.05 = 280,669.14 : x
  2. Step 2: Convert to fraction form
    640,323.72/960,259.05 = 280,669.14/x
  3. Step 3: Cross multiply
    640,323.72x = 960,259.05 × 280,669.14
  4. Step 4: Simplify right side
    640,323.72x = 269,515,081,740.72
  5. Step 5: Solve for x
    x = 269,515,081,740.72/640,323.72
  6. Step 6: Final answer
    x = 420,904.42

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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.