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Finding the Fourth Proportional to 306,428.94, 459,641.93 and 78,724.37

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Solution

The fourth proportional to 306,428.94, 459,641.93 and 78,724.37 is: 118,086.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,428.94 : 459,641.93 = 78,724.37 : x
  2. Step 2: Convert to fraction form
    306,428.94/459,641.93 = 78,724.37/x
  3. Step 3: Cross multiply
    306,428.94x = 459,641.93 × 78,724.37
  4. Step 4: Simplify right side
    306,428.94x = 36,185,022,120.32
  5. Step 5: Solve for x
    x = 36,185,022,120.32/306,428.94
  6. Step 6: Final answer
    x = 118,086.18

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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.