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Finding the Fourth Proportional to 713,836.80, 985,144.86 and 407,958.30

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Solution

The fourth proportional to 713,836.80, 985,144.86 and 407,958.30 is: 563,011.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,836.80 : 985,144.86 = 407,958.30 : x
  2. Step 2: Convert to fraction form
    713,836.80/985,144.86 = 407,958.30/x
  3. Step 3: Cross multiply
    713,836.80x = 985,144.86 × 407,958.30
  4. Step 4: Simplify right side
    713,836.80x = 401,898,022,339.34
  5. Step 5: Solve for x
    x = 401,898,022,339.34/713,836.80
  6. Step 6: Final answer
    x = 563,011.07

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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.