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Finding the Fourth Proportional to 693,515.81, 957,045.89 and 387,605.09

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Solution

The fourth proportional to 693,515.81, 957,045.89 and 387,605.09 is: 534,891.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,515.81 : 957,045.89 = 387,605.09 : x
  2. Step 2: Convert to fraction form
    693,515.81/957,045.89 = 387,605.09/x
  3. Step 3: Cross multiply
    693,515.81x = 957,045.89 × 387,605.09
  4. Step 4: Simplify right side
    693,515.81x = 370,955,858,327.58
  5. Step 5: Solve for x
    x = 370,955,858,327.58/693,515.81
  6. Step 6: Final answer
    x = 534,891.71

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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.