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Finding the Fourth Proportional to 638,951.40, 958,427.10 and 195,719.40

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Solution

The fourth proportional to 638,951.40, 958,427.10 and 195,719.40 is: 293,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,951.40 : 958,427.10 = 195,719.40 : x
  2. Step 2: Convert to fraction form
    638,951.40/958,427.10 = 195,719.40/x
  3. Step 3: Cross multiply
    638,951.40x = 958,427.10 × 195,719.40
  4. Step 4: Simplify right side
    638,951.40x = 187,582,776,955.74
  5. Step 5: Solve for x
    x = 187,582,776,955.74/638,951.40
  6. Step 6: Final answer
    x = 293,579.10

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Half scale
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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.