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Finding the Fourth Proportional to 297,859.30, 411,042.70 and 221,718.90

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Solution

The fourth proportional to 297,859.30, 411,042.70 and 221,718.90 is: 305,969.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,859.30 : 411,042.70 = 221,718.90 : x
  2. Step 2: Convert to fraction form
    297,859.30/411,042.70 = 221,718.90/x
  3. Step 3: Cross multiply
    297,859.30x = 411,042.70 × 221,718.90
  4. Step 4: Simplify right side
    297,859.30x = 91,135,935,297.03
  5. Step 5: Solve for x
    x = 91,135,935,297.03/297,859.30
  6. Step 6: Final answer
    x = 305,969.75

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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.