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Finding the Fourth Proportional to 321,863.40, 482,795.10 and 308,212.20

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Solution

The fourth proportional to 321,863.40, 482,795.10 and 308,212.20 is: 462,318.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,863.40 : 482,795.10 = 308,212.20 : x
  2. Step 2: Convert to fraction form
    321,863.40/482,795.10 = 308,212.20/x
  3. Step 3: Cross multiply
    321,863.40x = 482,795.10 × 308,212.20
  4. Step 4: Simplify right side
    321,863.40x = 148,803,339,920.22
  5. Step 5: Solve for x
    x = 148,803,339,920.22/321,863.40
  6. Step 6: Final answer
    x = 462,318.30

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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.