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Finding the Fourth Proportional to 559,921.60, 839,882.40 and 279,985.60

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Solution

The fourth proportional to 559,921.60, 839,882.40 and 279,985.60 is: 419,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,921.60 : 839,882.40 = 279,985.60 : x
  2. Step 2: Convert to fraction form
    559,921.60/839,882.40 = 279,985.60/x
  3. Step 3: Cross multiply
    559,921.60x = 839,882.40 × 279,985.60
  4. Step 4: Simplify right side
    559,921.60x = 235,154,977,693.44
  5. Step 5: Solve for x
    x = 235,154,977,693.44/559,921.60
  6. Step 6: Final answer
    x = 419,978.40

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Half scale
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Double scale
Find fourth proportional to 559,922.60, 839,883.90 and 279,986.60
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.