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Finding the Fourth Proportional to 262,486.80, 393,730.20 and 209,998.80

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Solution

The fourth proportional to 262,486.80, 393,730.20 and 209,998.80 is: 314,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,486.80 : 393,730.20 = 209,998.80 : x
  2. Step 2: Convert to fraction form
    262,486.80/393,730.20 = 209,998.80/x
  3. Step 3: Cross multiply
    262,486.80x = 393,730.20 × 209,998.80
  4. Step 4: Simplify right side
    262,486.80x = 82,682,869,523.76
  5. Step 5: Solve for x
    x = 82,682,869,523.76/262,486.80
  6. Step 6: Final answer
    x = 314,998.20

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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.