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Finding the Fourth Proportional to 221,290.19, 331,638.80 and 207,118.43

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Solution

The fourth proportional to 221,290.19, 331,638.80 and 207,118.43 is: 310,400.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,290.19 : 331,638.80 = 207,118.43 : x
  2. Step 2: Convert to fraction form
    221,290.19/331,638.80 = 207,118.43/x
  3. Step 3: Cross multiply
    221,290.19x = 331,638.80 × 207,118.43
  4. Step 4: Simplify right side
    221,290.19x = 68,688,504,889.30
  5. Step 5: Solve for x
    x = 68,688,504,889.30/221,290.19
  6. Step 6: Final answer
    x = 310,400.14

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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.