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Finding the Fourth Proportional to 720,570.53, 994,387.39 and 393,884.84

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Solution

The fourth proportional to 720,570.53, 994,387.39 and 393,884.84 is: 543,561.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,570.53 : 994,387.39 = 393,884.84 : x
  2. Step 2: Convert to fraction form
    720,570.53/994,387.39 = 393,884.84/x
  3. Step 3: Cross multiply
    720,570.53x = 994,387.39 × 393,884.84
  4. Step 4: Simplify right side
    720,570.53x = 391,674,119,509.42
  5. Step 5: Solve for x
    x = 391,674,119,509.42/720,570.53
  6. Step 6: Final answer
    x = 543,561.11

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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.