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Finding the Fourth Proportional to 261,907.50, 361,415.34 and 154,452.90

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Solution

The fourth proportional to 261,907.50, 361,415.34 and 154,452.90 is: 213,134.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,907.50 : 361,415.34 = 154,452.90 : x
  2. Step 2: Convert to fraction form
    261,907.50/361,415.34 = 154,452.90/x
  3. Step 3: Cross multiply
    261,907.50x = 361,415.34 × 154,452.90
  4. Step 4: Simplify right side
    261,907.50x = 55,821,647,367.49
  5. Step 5: Solve for x
    x = 55,821,647,367.49/261,907.50
  6. Step 6: Final answer
    x = 213,134.97

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1.5x scale

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.