Home / 409,401.65-565,015.83-228,143.09

Finding the Fourth Proportional to 409,401.65, 565,015.83 and 228,143.09

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Solution

The fourth proportional to 409,401.65, 565,015.83 and 228,143.09 is: 314,860.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,401.65 : 565,015.83 = 228,143.09 : x
  2. Step 2: Convert to fraction form
    409,401.65/565,015.83 = 228,143.09/x
  3. Step 3: Cross multiply
    409,401.65x = 565,015.83 × 228,143.09
  4. Step 4: Simplify right side
    409,401.65x = 128,904,457,355.12
  5. Step 5: Solve for x
    x = 128,904,457,355.12/409,401.65
  6. Step 6: Final answer
    x = 314,860.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.