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Finding the Fourth Proportional to 638,289.48, 957,437.36 and 189,018.84

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Solution

The fourth proportional to 638,289.48, 957,437.36 and 189,018.84 is: 283,529.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,289.48 : 957,437.36 = 189,018.84 : x
  2. Step 2: Convert to fraction form
    638,289.48/957,437.36 = 189,018.84/x
  3. Step 3: Cross multiply
    638,289.48x = 957,437.36 × 189,018.84
  4. Step 4: Simplify right side
    638,289.48x = 180,973,699,159.86
  5. Step 5: Solve for x
    x = 180,973,699,159.86/638,289.48
  6. Step 6: Final answer
    x = 283,529.19

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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.