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Finding the Fourth Proportional to 638,019.20, 956,974.80 and 194,787.20

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Solution

The fourth proportional to 638,019.20, 956,974.80 and 194,787.20 is: 292,164.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,019.20 : 956,974.80 = 194,787.20 : x
  2. Step 2: Convert to fraction form
    638,019.20/956,974.80 = 194,787.20/x
  3. Step 3: Cross multiply
    638,019.20x = 956,974.80 × 194,787.20
  4. Step 4: Simplify right side
    638,019.20x = 186,406,441,762.56
  5. Step 5: Solve for x
    x = 186,406,441,762.56/638,019.20
  6. Step 6: Final answer
    x = 292,164.31

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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.