Home / 665,278.80-997,918.20-191,979.60

Finding the Fourth Proportional to 665,278.80, 997,918.20 and 191,979.60

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Solution

The fourth proportional to 665,278.80, 997,918.20 and 191,979.60 is: 287,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,278.80 : 997,918.20 = 191,979.60 : x
  2. Step 2: Convert to fraction form
    665,278.80/997,918.20 = 191,979.60/x
  3. Step 3: Cross multiply
    665,278.80x = 997,918.20 × 191,979.60
  4. Step 4: Simplify right side
    665,278.80x = 191,579,936,868.72
  5. Step 5: Solve for x
    x = 191,579,936,868.72/665,278.80
  6. Step 6: Final answer
    x = 287,969.40

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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.