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Finding the Fourth Proportional to 393,725.61, 543,152.39 and 257,699.68

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Solution

The fourth proportional to 393,725.61, 543,152.39 and 257,699.68 is: 355,501.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,725.61 : 543,152.39 = 257,699.68 : x
  2. Step 2: Convert to fraction form
    393,725.61/543,152.39 = 257,699.68/x
  3. Step 3: Cross multiply
    393,725.61x = 543,152.39 × 257,699.68
  4. Step 4: Simplify right side
    393,725.61x = 139,970,194,447.86
  5. Step 5: Solve for x
    x = 139,970,194,447.86/393,725.61
  6. Step 6: Final answer
    x = 355,501.88

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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.