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Finding the Fourth Proportional to 619.20, 928.53 and 186.39

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Solution

The fourth proportional to 619.20, 928.53 and 186.39 is: 279.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.20 : 928.53 = 186.39 : x
  2. Step 2: Convert to fraction form
    619.20/928.53 = 186.39/x
  3. Step 3: Cross multiply
    619.20x = 928.53 × 186.39
  4. Step 4: Simplify right side
    619.20x = 173,068.71
  5. Step 5: Solve for x
    x = 173,068.71/619.20
  6. Step 6: Final answer
    x = 279.50

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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.