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Finding the Fourth Proportional to 342,136.80, 513,205.20 and 322,783.20

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Solution

The fourth proportional to 342,136.80, 513,205.20 and 322,783.20 is: 484,174.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,136.80 : 513,205.20 = 322,783.20 : x
  2. Step 2: Convert to fraction form
    342,136.80/513,205.20 = 322,783.20/x
  3. Step 3: Cross multiply
    342,136.80x = 513,205.20 × 322,783.20
  4. Step 4: Simplify right side
    342,136.80x = 165,654,016,712.64
  5. Step 5: Solve for x
    x = 165,654,016,712.64/342,136.80
  6. Step 6: Final answer
    x = 484,174.80

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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.