Home / 409,184.20-613,776.30-128,787.40

Finding the Fourth Proportional to 409,184.20, 613,776.30 and 128,787.40

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Solution

The fourth proportional to 409,184.20, 613,776.30 and 128,787.40 is: 193,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,184.20 : 613,776.30 = 128,787.40 : x
  2. Step 2: Convert to fraction form
    409,184.20/613,776.30 = 128,787.40/x
  3. Step 3: Cross multiply
    409,184.20x = 613,776.30 × 128,787.40
  4. Step 4: Simplify right side
    409,184.20x = 79,046,653,858.62
  5. Step 5: Solve for x
    x = 79,046,653,858.62/409,184.20
  6. Step 6: Final answer
    x = 193,181.10

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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.