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Finding the Fourth Proportional to 714,437.68, 985,936.75 and 392,177.78

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Solution

The fourth proportional to 714,437.68, 985,936.75 and 392,177.78 is: 541,212.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,437.68 : 985,936.75 = 392,177.78 : x
  2. Step 2: Convert to fraction form
    714,437.68/985,936.75 = 392,177.78/x
  3. Step 3: Cross multiply
    714,437.68x = 985,936.75 × 392,177.78
  4. Step 4: Simplify right side
    714,437.68x = 386,662,485,835.42
  5. Step 5: Solve for x
    x = 386,662,485,835.42/714,437.68
  6. Step 6: Final answer
    x = 541,212.34

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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.