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Finding the Fourth Proportional to 691,143.87, 953,783.01 and 385,239.69

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Solution

The fourth proportional to 691,143.87, 953,783.01 and 385,239.69 is: 531,633.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,143.87 : 953,783.01 = 385,239.69 : x
  2. Step 2: Convert to fraction form
    691,143.87/953,783.01 = 385,239.69/x
  3. Step 3: Cross multiply
    691,143.87x = 953,783.01 × 385,239.69
  4. Step 4: Simplify right side
    691,143.87x = 367,435,071,099.67
  5. Step 5: Solve for x
    x = 367,435,071,099.67/691,143.87
  6. Step 6: Final answer
    x = 531,633.26

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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.