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Finding the Fourth Proportional to 485,782.44, 670,499.96 and 330,989.76

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Solution

The fourth proportional to 485,782.44, 670,499.96 and 330,989.76 is: 456,847.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,782.44 : 670,499.96 = 330,989.76 : x
  2. Step 2: Convert to fraction form
    485,782.44/670,499.96 = 330,989.76/x
  3. Step 3: Cross multiply
    485,782.44x = 670,499.96 × 330,989.76
  4. Step 4: Simplify right side
    485,782.44x = 221,928,620,840.41
  5. Step 5: Solve for x
    x = 221,928,620,840.41/485,782.44
  6. Step 6: Final answer
    x = 456,847.76

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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.