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Finding the Fourth Proportional to 321,838.80, 482,758.20 and 210,427.60

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Solution

The fourth proportional to 321,838.80, 482,758.20 and 210,427.60 is: 315,641.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,838.80 : 482,758.20 = 210,427.60 : x
  2. Step 2: Convert to fraction form
    321,838.80/482,758.20 = 210,427.60/x
  3. Step 3: Cross multiply
    321,838.80x = 482,758.20 × 210,427.60
  4. Step 4: Simplify right side
    321,838.80x = 101,585,649,406.32
  5. Step 5: Solve for x
    x = 101,585,649,406.32/321,838.80
  6. Step 6: Final answer
    x = 315,641.40

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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.