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Finding the Fourth Proportional to 221,003.80, 330,630.90 and 191,746.60

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Solution

The fourth proportional to 221,003.80, 330,630.90 and 191,746.60 is: 286,860.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,003.80 : 330,630.90 = 191,746.60 : x
  2. Step 2: Convert to fraction form
    221,003.80/330,630.90 = 191,746.60/x
  3. Step 3: Cross multiply
    221,003.80x = 330,630.90 × 191,746.60
  4. Step 4: Simplify right side
    221,003.80x = 63,397,350,929.94
  5. Step 5: Solve for x
    x = 63,397,350,929.94/221,003.80
  6. Step 6: Final answer
    x = 286,860.91

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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.