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Finding the Fourth Proportional to 393,158.57, 542,555.99 and 223,392.69

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Solution

The fourth proportional to 393,158.57, 542,555.99 and 223,392.69 is: 308,280.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,158.57 : 542,555.99 = 223,392.69 : x
  2. Step 2: Convert to fraction form
    393,158.57/542,555.99 = 223,392.69/x
  3. Step 3: Cross multiply
    393,158.57x = 542,555.99 × 223,392.69
  4. Step 4: Simplify right side
    393,158.57x = 121,203,041,802.47
  5. Step 5: Solve for x
    x = 121,203,041,802.47/393,158.57
  6. Step 6: Final answer
    x = 308,280.30

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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.