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Finding the Fourth Proportional to 505,657.20, 697,813.08 and 279,327.60

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Solution

The fourth proportional to 505,657.20, 697,813.08 and 279,327.60 is: 385,475.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,657.20 : 697,813.08 = 279,327.60 : x
  2. Step 2: Convert to fraction form
    505,657.20/697,813.08 = 279,327.60/x
  3. Step 3: Cross multiply
    505,657.20x = 697,813.08 × 279,327.60
  4. Step 4: Simplify right side
    505,657.20x = 194,918,452,885.01
  5. Step 5: Solve for x
    x = 194,918,452,885.01/505,657.20
  6. Step 6: Final answer
    x = 385,475.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.