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Finding the Fourth Proportional to 631,811.80, 947,372.10 and 257,411.80

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Solution

The fourth proportional to 631,811.80, 947,372.10 and 257,411.80 is: 385,976.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,811.80 : 947,372.10 = 257,411.80 : x
  2. Step 2: Convert to fraction form
    631,811.80/947,372.10 = 257,411.80/x
  3. Step 3: Cross multiply
    631,811.80x = 947,372.10 × 257,411.80
  4. Step 4: Simplify right side
    631,811.80x = 243,864,757,530.78
  5. Step 5: Solve for x
    x = 243,864,757,530.78/631,811.80
  6. Step 6: Final answer
    x = 385,976.90

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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.