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Finding the Fourth Proportional to 306,485.94, 459,724.30 and 137,887.21

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Solution

The fourth proportional to 306,485.94, 459,724.30 and 137,887.21 is: 206,828.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,485.94 : 459,724.30 = 137,887.21 : x
  2. Step 2: Convert to fraction form
    306,485.94/459,724.30 = 137,887.21/x
  3. Step 3: Cross multiply
    306,485.94x = 459,724.30 × 137,887.21
  4. Step 4: Simplify right side
    306,485.94x = 63,390,098,108.15
  5. Step 5: Solve for x
    x = 63,390,098,108.15/306,485.94
  6. Step 6: Final answer
    x = 206,828.73

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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.