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Finding the Fourth Proportional to 319,380.87, 478,932.23 and 91,626.23

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Solution

The fourth proportional to 319,380.87, 478,932.23 and 91,626.23 is: 137,399.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,380.87 : 478,932.23 = 91,626.23 : x
  2. Step 2: Convert to fraction form
    319,380.87/478,932.23 = 91,626.23/x
  3. Step 3: Cross multiply
    319,380.87x = 478,932.23 × 91,626.23
  4. Step 4: Simplify right side
    319,380.87x = 43,882,755,399.59
  5. Step 5: Solve for x
    x = 43,882,755,399.59/319,380.87
  6. Step 6: Final answer
    x = 137,399.45

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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.