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Finding the Fourth Proportional to 492,210.80, 738,661.80 and 211,929.20

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Solution

The fourth proportional to 492,210.80, 738,661.80 and 211,929.20 is: 318,042.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,210.80 : 738,661.80 = 211,929.20 : x
  2. Step 2: Convert to fraction form
    492,210.80/738,661.80 = 211,929.20/x
  3. Step 3: Cross multiply
    492,210.80x = 738,661.80 × 211,929.20
  4. Step 4: Simplify right side
    492,210.80x = 156,544,004,344.56
  5. Step 5: Solve for x
    x = 156,544,004,344.56/492,210.80
  6. Step 6: Final answer
    x = 318,042.60

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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.