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Finding the Fourth Proportional to 713,784.02, 985,049.52 and 391,507.70

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Solution

The fourth proportional to 713,784.02, 985,049.52 and 391,507.70 is: 540,295.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,784.02 : 985,049.52 = 391,507.70 : x
  2. Step 2: Convert to fraction form
    713,784.02/985,049.52 = 391,507.70/x
  3. Step 3: Cross multiply
    713,784.02x = 985,049.52 × 391,507.70
  4. Step 4: Simplify right side
    713,784.02x = 385,654,471,961.30
  5. Step 5: Solve for x
    x = 385,654,471,961.30/713,784.02
  6. Step 6: Final answer
    x = 540,295.75

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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.