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Finding the Fourth Proportional to 321,912.10, 482,868.15 and 255,556.90

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Solution

The fourth proportional to 321,912.10, 482,868.15 and 255,556.90 is: 383,335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,912.10 : 482,868.15 = 255,556.90 : x
  2. Step 2: Convert to fraction form
    321,912.10/482,868.15 = 255,556.90/x
  3. Step 3: Cross multiply
    321,912.10x = 482,868.15 × 255,556.90
  4. Step 4: Simplify right side
    321,912.10x = 123,400,287,522.74
  5. Step 5: Solve for x
    x = 123,400,287,522.74/321,912.10
  6. Step 6: Final answer
    x = 383,335.35

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1.5x scale

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.