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Finding the Fourth Proportional to 330,863.72, 496,232.25 and 128,459.81

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Solution

The fourth proportional to 330,863.72, 496,232.25 and 128,459.81 is: 192,665.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,863.72 : 496,232.25 = 128,459.81 : x
  2. Step 2: Convert to fraction form
    330,863.72/496,232.25 = 128,459.81/x
  3. Step 3: Cross multiply
    330,863.72x = 496,232.25 × 128,459.81
  4. Step 4: Simplify right side
    330,863.72x = 63,745,898,069.71
  5. Step 5: Solve for x
    x = 63,745,898,069.71/330,863.72
  6. Step 6: Final answer
    x = 192,665.12

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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.