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Finding the Fourth Proportional to 485,745.62, 728,667.04 and 148,782.38

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Solution

The fourth proportional to 485,745.62, 728,667.04 and 148,782.38 is: 223,188.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,745.62 : 728,667.04 = 148,782.38 : x
  2. Step 2: Convert to fraction form
    485,745.62/728,667.04 = 148,782.38/x
  3. Step 3: Cross multiply
    485,745.62x = 728,667.04 × 148,782.38
  4. Step 4: Simplify right side
    485,745.62x = 108,412,816,438.76
  5. Step 5: Solve for x
    x = 108,412,816,438.76/485,745.62
  6. Step 6: Final answer
    x = 223,188.46

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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.