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Finding the Fourth Proportional to 586,353.21, 809,168.99 and 318,081.21

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Solution

The fourth proportional to 586,353.21, 809,168.99 and 318,081.21 is: 438,952.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,353.21 : 809,168.99 = 318,081.21 : x
  2. Step 2: Convert to fraction form
    586,353.21/809,168.99 = 318,081.21/x
  3. Step 3: Cross multiply
    586,353.21x = 809,168.99 × 318,081.21
  4. Step 4: Simplify right side
    586,353.21x = 257,381,449,843.27
  5. Step 5: Solve for x
    x = 257,381,449,843.27/586,353.21
  6. Step 6: Final answer
    x = 438,952.91

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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.