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Finding the Fourth Proportional to 262,021.40, 361,223.40 and 221,572.88

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Solution

The fourth proportional to 262,021.40, 361,223.40 and 221,572.88 is: 305,460.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,021.40 : 361,223.40 = 221,572.88 : x
  2. Step 2: Convert to fraction form
    262,021.40/361,223.40 = 221,572.88/x
  3. Step 3: Cross multiply
    262,021.40x = 361,223.40 × 221,572.88
  4. Step 4: Simplify right side
    262,021.40x = 80,037,309,061.39
  5. Step 5: Solve for x
    x = 80,037,309,061.39/262,021.40
  6. Step 6: Final answer
    x = 305,460.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.