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Finding the Fourth Proportional to 640,852.02, 961,470.72 and 191,587.50

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Solution

The fourth proportional to 640,852.02, 961,470.72 and 191,587.50 is: 287,438.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,852.02 : 961,470.72 = 191,587.50 : x
  2. Step 2: Convert to fraction form
    640,852.02/961,470.72 = 191,587.50/x
  3. Step 3: Cross multiply
    640,852.02x = 961,470.72 × 191,587.50
  4. Step 4: Simplify right side
    640,852.02x = 184,205,771,568
  5. Step 5: Solve for x
    x = 184,205,771,568/640,852.02
  6. Step 6: Final answer
    x = 287,438.86

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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.