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Finding the Fourth Proportional to 640,628.92, 961,298.07 and 383,830.44

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Solution

The fourth proportional to 640,628.92, 961,298.07 and 383,830.44 is: 575,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,628.92 : 961,298.07 = 383,830.44 : x
  2. Step 2: Convert to fraction form
    640,628.92/961,298.07 = 383,830.44/x
  3. Step 3: Cross multiply
    640,628.92x = 961,298.07 × 383,830.44
  4. Step 4: Simplify right side
    640,628.92x = 368,975,461,179.25
  5. Step 5: Solve for x
    x = 368,975,461,179.25/640,628.92
  6. Step 6: Final answer
    x = 575,958.17

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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.