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Finding the Fourth Proportional to 611,761.20, 917,641.80 and 191,079.60

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Solution

The fourth proportional to 611,761.20, 917,641.80 and 191,079.60 is: 286,619.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,761.20 : 917,641.80 = 191,079.60 : x
  2. Step 2: Convert to fraction form
    611,761.20/917,641.80 = 191,079.60/x
  3. Step 3: Cross multiply
    611,761.20x = 917,641.80 × 191,079.60
  4. Step 4: Simplify right side
    611,761.20x = 175,342,628,087.28
  5. Step 5: Solve for x
    x = 175,342,628,087.28/611,761.20
  6. Step 6: Final answer
    x = 286,619.40

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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.