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Finding the Fourth Proportional to 330,406.56, 495,366.84 and 105,638.04

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Solution

The fourth proportional to 330,406.56, 495,366.84 and 105,638.04 is: 158,379.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,406.56 : 495,366.84 = 105,638.04 : x
  2. Step 2: Convert to fraction form
    330,406.56/495,366.84 = 105,638.04/x
  3. Step 3: Cross multiply
    330,406.56x = 495,366.84 × 105,638.04
  4. Step 4: Simplify right side
    330,406.56x = 52,329,582,058.59
  5. Step 5: Solve for x
    x = 52,329,582,058.59/330,406.56
  6. Step 6: Final answer
    x = 158,379.37

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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.