Home / 693,145.40-1,040,178.90-393,625.40

Finding the Fourth Proportional to 693,145.40, 1,040,178.90 and 393,625.40

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Solution

The fourth proportional to 693,145.40, 1,040,178.90 and 393,625.40 is: 590,699.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    693,145.40 : 1,040,178.90 = 393,625.40 : x
  2. Step 2: Convert to fraction form
    693,145.40/1,040,178.90 = 393,625.40/x
  3. Step 3: Cross multiply
    693,145.40x = 1,040,178.90 × 393,625.40
  4. Step 4: Simplify right side
    693,145.40x = 409,440,835,584.06
  5. Step 5: Solve for x
    x = 409,440,835,584.06/693,145.40
  6. Step 6: Final answer
    x = 590,699.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.