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Finding the Fourth Proportional to 640,940.20, 960,143.10 and 562,143.40

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Solution

The fourth proportional to 640,940.20, 960,143.10 and 562,143.40 is: 842,103.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,940.20 : 960,143.10 = 562,143.40 : x
  2. Step 2: Convert to fraction form
    640,940.20/960,143.10 = 562,143.40/x
  3. Step 3: Cross multiply
    640,940.20x = 960,143.10 × 562,143.40
  4. Step 4: Simplify right side
    640,940.20x = 539,738,106,720.54
  5. Step 5: Solve for x
    x = 539,738,106,720.54/640,940.20
  6. Step 6: Final answer
    x = 842,103.69

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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.