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Finding the Fourth Proportional to 393,585.80, 543,142.39 and 219,154.83

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Solution

The fourth proportional to 393,585.80, 543,142.39 and 219,154.83 is: 302,430.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,585.80 : 543,142.39 = 219,154.83 : x
  2. Step 2: Convert to fraction form
    393,585.80/543,142.39 = 219,154.83/x
  3. Step 3: Cross multiply
    393,585.80x = 543,142.39 × 219,154.83
  4. Step 4: Simplify right side
    393,585.80x = 119,032,276,813.33
  5. Step 5: Solve for x
    x = 119,032,276,813.33/393,585.80
  6. Step 6: Final answer
    x = 302,430.31

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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.