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Finding the Fourth Proportional to 319,911.55, 479,485.60 and 148,903.13

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Solution

The fourth proportional to 319,911.55, 479,485.60 and 148,903.13 is: 223,177.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,911.55 : 479,485.60 = 148,903.13 : x
  2. Step 2: Convert to fraction form
    319,911.55/479,485.60 = 148,903.13/x
  3. Step 3: Cross multiply
    319,911.55x = 479,485.60 × 148,903.13
  4. Step 4: Simplify right side
    319,911.55x = 71,396,907,456.38
  5. Step 5: Solve for x
    x = 71,396,907,456.38/319,911.55
  6. Step 6: Final answer
    x = 223,177.03

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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.