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Finding the Fourth Proportional to 405,015.20, 607,695.60 and 194,544.80

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Solution

The fourth proportional to 405,015.20, 607,695.60 and 194,544.80 is: 291,900.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,015.20 : 607,695.60 = 194,544.80 : x
  2. Step 2: Convert to fraction form
    405,015.20/607,695.60 = 194,544.80/x
  3. Step 3: Cross multiply
    405,015.20x = 607,695.60 × 194,544.80
  4. Step 4: Simplify right side
    405,015.20x = 118,224,018,962.88
  5. Step 5: Solve for x
    x = 118,224,018,962.88/405,015.20
  6. Step 6: Final answer
    x = 291,900.20

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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.