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Finding the Fourth Proportional to 863,665.90, 1,295,664.90 and 331,145.40

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Solution

The fourth proportional to 863,665.90, 1,295,664.90 and 331,145.40 is: 496,781.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,665.90 : 1,295,664.90 = 331,145.40 : x
  2. Step 2: Convert to fraction form
    863,665.90/1,295,664.90 = 331,145.40/x
  3. Step 3: Cross multiply
    863,665.90x = 1,295,664.90 × 331,145.40
  4. Step 4: Simplify right side
    863,665.90x = 429,053,467,923.37
  5. Step 5: Solve for x
    x = 429,053,467,923.37/863,665.90
  6. Step 6: Final answer
    x = 496,781.76

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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.