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Finding the Fourth Proportional to 640,287.99, 960,431.58 and 191,323.82

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Solution

The fourth proportional to 640,287.99, 960,431.58 and 191,323.82 is: 286,985.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,287.99 : 960,431.58 = 191,323.82 : x
  2. Step 2: Convert to fraction form
    640,287.99/960,431.58 = 191,323.82/x
  3. Step 3: Cross multiply
    640,287.99x = 960,431.58 × 191,323.82
  4. Step 4: Simplify right side
    640,287.99x = 183,753,441,135.32
  5. Step 5: Solve for x
    x = 183,753,441,135.32/640,287.99
  6. Step 6: Final answer
    x = 286,985.61

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Similar ratio
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1.5x scale

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.