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Finding the Fourth Proportional to 330,539.08, 495,768.64 and 90,672.51

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Solution

The fourth proportional to 330,539.08, 495,768.64 and 90,672.51 is: 135,997.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,539.08 : 495,768.64 = 90,672.51 : x
  2. Step 2: Convert to fraction form
    330,539.08/495,768.64 = 90,672.51/x
  3. Step 3: Cross multiply
    330,539.08x = 495,768.64 × 90,672.51
  4. Step 4: Simplify right side
    330,539.08x = 44,952,585,505.75
  5. Step 5: Solve for x
    x = 44,952,585,505.75/330,539.08
  6. Step 6: Final answer
    x = 135,997.79

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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.