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Finding the Fourth Proportional to 328,147.77, 492,011.46 and 138,556.74

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Solution

The fourth proportional to 328,147.77, 492,011.46 and 138,556.74 is: 207,746.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,147.77 : 492,011.46 = 138,556.74 : x
  2. Step 2: Convert to fraction form
    328,147.77/492,011.46 = 138,556.74/x
  3. Step 3: Cross multiply
    328,147.77x = 492,011.46 × 138,556.74
  4. Step 4: Simplify right side
    328,147.77x = 68,171,503,940.24
  5. Step 5: Solve for x
    x = 68,171,503,940.24/328,147.77
  6. Step 6: Final answer
    x = 207,746.36

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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.