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Finding the Fourth Proportional to 576,639.30, 865,110.15 and 221,664.90

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Solution

The fourth proportional to 576,639.30, 865,110.15 and 221,664.90 is: 332,555.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,639.30 : 865,110.15 = 221,664.90 : x
  2. Step 2: Convert to fraction form
    576,639.30/865,110.15 = 221,664.90/x
  3. Step 3: Cross multiply
    576,639.30x = 865,110.15 × 221,664.90
  4. Step 4: Simplify right side
    576,639.30x = 191,764,554,888.74
  5. Step 5: Solve for x
    x = 191,764,554,888.74/576,639.30
  6. Step 6: Final answer
    x = 332,555.47

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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.