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Finding the Fourth Proportional to 320,311.88, 480,757.59 and 170,678.55

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Solution

The fourth proportional to 320,311.88, 480,757.59 and 170,678.55 is: 256,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,311.88 : 480,757.59 = 170,678.55 : x
  2. Step 2: Convert to fraction form
    320,311.88/480,757.59 = 170,678.55/x
  3. Step 3: Cross multiply
    320,311.88x = 480,757.59 × 170,678.55
  4. Step 4: Simplify right side
    320,311.88x = 82,055,008,362.69
  5. Step 5: Solve for x
    x = 82,055,008,362.69/320,311.88
  6. Step 6: Final answer
    x = 256,172.23

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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.