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Finding the Fourth Proportional to 383,205, 528,839.06 and 213,439.08

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Solution

The fourth proportional to 383,205, 528,839.06 and 213,439.08 is: 294,554.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,205 : 528,839.06 = 213,439.08 : x
  2. Step 2: Convert to fraction form
    383,205/528,839.06 = 213,439.08/x
  3. Step 3: Cross multiply
    383,205x = 528,839.06 × 213,439.08
  4. Step 4: Simplify right side
    383,205x = 112,874,922,434.47
  5. Step 5: Solve for x
    x = 112,874,922,434.47/383,205
  6. Step 6: Final answer
    x = 294,554.93

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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.