Home / 665,427.40-998,141.10-192,128.20

Finding the Fourth Proportional to 665,427.40, 998,141.10 and 192,128.20

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Solution

The fourth proportional to 665,427.40, 998,141.10 and 192,128.20 is: 288,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,427.40 : 998,141.10 = 192,128.20 : x
  2. Step 2: Convert to fraction form
    665,427.40/998,141.10 = 192,128.20/x
  3. Step 3: Cross multiply
    665,427.40x = 998,141.10 × 192,128.20
  4. Step 4: Simplify right side
    665,427.40x = 191,771,052,889.02
  5. Step 5: Solve for x
    x = 191,771,052,889.02/665,427.40
  6. Step 6: Final answer
    x = 288,192.30

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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.