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Finding the Fourth Proportional to 307,668.20, 424,603.40 and 171,728.60

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Solution

The fourth proportional to 307,668.20, 424,603.40 and 171,728.60 is: 236,997.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,668.20 : 424,603.40 = 171,728.60 : x
  2. Step 2: Convert to fraction form
    307,668.20/424,603.40 = 171,728.60/x
  3. Step 3: Cross multiply
    307,668.20x = 424,603.40 × 171,728.60
  4. Step 4: Simplify right side
    307,668.20x = 72,916,544,455.58
  5. Step 5: Solve for x
    x = 72,916,544,455.58/307,668.20
  6. Step 6: Final answer
    x = 236,997.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.