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Finding the Fourth Proportional to 221,290.94, 331,639.92 and 207,119.18

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Solution

The fourth proportional to 221,290.94, 331,639.92 and 207,119.18 is: 310,401.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,290.94 : 331,639.92 = 207,119.18 : x
  2. Step 2: Convert to fraction form
    221,290.94/331,639.92 = 207,119.18/x
  3. Step 3: Cross multiply
    221,290.94x = 331,639.92 × 207,119.18
  4. Step 4: Simplify right side
    221,290.94x = 68,688,986,627.47
  5. Step 5: Solve for x
    x = 68,688,986,627.47/221,290.94
  6. Step 6: Final answer
    x = 310,401.27

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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.