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Finding the Fourth Proportional to 223,415.40, 335,123.10 and 221,860.20

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Solution

The fourth proportional to 223,415.40, 335,123.10 and 221,860.20 is: 332,790.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,415.40 : 335,123.10 = 221,860.20 : x
  2. Step 2: Convert to fraction form
    223,415.40/335,123.10 = 221,860.20/x
  3. Step 3: Cross multiply
    223,415.40x = 335,123.10 × 221,860.20
  4. Step 4: Simplify right side
    223,415.40x = 74,350,477,990.62
  5. Step 5: Solve for x
    x = 74,350,477,990.62/223,415.40
  6. Step 6: Final answer
    x = 332,790.30

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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.