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Finding the Fourth Proportional to 330,327.72, 455,890.50 and 310,060.44

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Solution

The fourth proportional to 330,327.72, 455,890.50 and 310,060.44 is: 427,919.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,327.72 : 455,890.50 = 310,060.44 : x
  2. Step 2: Convert to fraction form
    330,327.72/455,890.50 = 310,060.44/x
  3. Step 3: Cross multiply
    330,327.72x = 455,890.50 × 310,060.44
  4. Step 4: Simplify right side
    330,327.72x = 141,353,609,021.82
  5. Step 5: Solve for x
    x = 141,353,609,021.82/330,327.72
  6. Step 6: Final answer
    x = 427,919.31

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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.