Home / 619,911.40-929,867.10-199,220.20

Finding the Fourth Proportional to 619,911.40, 929,867.10 and 199,220.20

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Solution

The fourth proportional to 619,911.40, 929,867.10 and 199,220.20 is: 298,830.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,911.40 : 929,867.10 = 199,220.20 : x
  2. Step 2: Convert to fraction form
    619,911.40/929,867.10 = 199,220.20/x
  3. Step 3: Cross multiply
    619,911.40x = 929,867.10 × 199,220.20
  4. Step 4: Simplify right side
    619,911.40x = 185,248,309,635.42
  5. Step 5: Solve for x
    x = 185,248,309,635.42/619,911.40
  6. Step 6: Final answer
    x = 298,830.30

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Half scale
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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.