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Finding the Fourth Proportional to 330,297.76, 455,999.76 and 217,448.56

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Solution

The fourth proportional to 330,297.76, 455,999.76 and 217,448.56 is: 300,203.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,297.76 : 455,999.76 = 217,448.56 : x
  2. Step 2: Convert to fraction form
    330,297.76/455,999.76 = 217,448.56/x
  3. Step 3: Cross multiply
    330,297.76x = 455,999.76 × 217,448.56
  4. Step 4: Simplify right side
    330,297.76x = 99,156,491,172.35
  5. Step 5: Solve for x
    x = 99,156,491,172.35/330,297.76
  6. Step 6: Final answer
    x = 300,203.34

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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.