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Finding the Fourth Proportional to 611,943.71, 917,915.39 and 191,219.58

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Solution

The fourth proportional to 611,943.71, 917,915.39 and 191,219.58 is: 286,829.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,943.71 : 917,915.39 = 191,219.58 : x
  2. Step 2: Convert to fraction form
    611,943.71/917,915.39 = 191,219.58/x
  3. Step 3: Cross multiply
    611,943.71x = 917,915.39 × 191,219.58
  4. Step 4: Simplify right side
    611,943.71x = 175,523,395,112.31
  5. Step 5: Solve for x
    x = 175,523,395,112.31/611,943.71
  6. Step 6: Final answer
    x = 286,829.32

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Double scale
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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.