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Finding the Fourth Proportional to 261,696.80, 393,128.40 and 251,069.60

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Solution

The fourth proportional to 261,696.80, 393,128.40 and 251,069.60 is: 377,163.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,696.80 : 393,128.40 = 251,069.60 : x
  2. Step 2: Convert to fraction form
    261,696.80/393,128.40 = 251,069.60/x
  3. Step 3: Cross multiply
    261,696.80x = 393,128.40 × 251,069.60
  4. Step 4: Simplify right side
    261,696.80x = 98,702,590,136.64
  5. Step 5: Solve for x
    x = 98,702,590,136.64/261,696.80
  6. Step 6: Final answer
    x = 377,163.92

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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.