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Finding the Fourth Proportional to 383,099.67, 528,689.57 and 211,030.11

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Solution

The fourth proportional to 383,099.67, 528,689.57 and 211,030.11 is: 291,228.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,099.67 : 528,689.57 = 211,030.11 : x
  2. Step 2: Convert to fraction form
    383,099.67/528,689.57 = 211,030.11/x
  3. Step 3: Cross multiply
    383,099.67x = 528,689.57 × 211,030.11
  4. Step 4: Simplify right side
    383,099.67x = 111,569,417,057.80
  5. Step 5: Solve for x
    x = 111,569,417,057.80/383,099.67
  6. Step 6: Final answer
    x = 291,228.17

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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.