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Finding the Fourth Proportional to 330,388.70, 495,659.45 and 117,145.31

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Solution

The fourth proportional to 330,388.70, 495,659.45 and 117,145.31 is: 175,745.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,388.70 : 495,659.45 = 117,145.31 : x
  2. Step 2: Convert to fraction form
    330,388.70/495,659.45 = 117,145.31/x
  3. Step 3: Cross multiply
    330,388.70x = 495,659.45 × 117,145.31
  4. Step 4: Simplify right side
    330,388.70x = 58,064,177,739.25
  5. Step 5: Solve for x
    x = 58,064,177,739.25/330,388.70
  6. Step 6: Final answer
    x = 175,745.05

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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.