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Finding the Fourth Proportional to 330,902.80, 495,768.60 and 319,939.60

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Solution

The fourth proportional to 330,902.80, 495,768.60 and 319,939.60 is: 479,343.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,902.80 : 495,768.60 = 319,939.60 : x
  2. Step 2: Convert to fraction form
    330,902.80/495,768.60 = 319,939.60/x
  3. Step 3: Cross multiply
    330,902.80x = 495,768.60 × 319,939.60
  4. Step 4: Simplify right side
    330,902.80x = 158,616,007,576.56
  5. Step 5: Solve for x
    x = 158,616,007,576.56/330,902.80
  6. Step 6: Final answer
    x = 479,343.20

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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.