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Finding the Fourth Proportional to 306,314.58, 459,004.08 and 128,724.51

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Solution

The fourth proportional to 306,314.58, 459,004.08 and 128,724.51 is: 192,890.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,314.58 : 459,004.08 = 128,724.51 : x
  2. Step 2: Convert to fraction form
    306,314.58/459,004.08 = 128,724.51/x
  3. Step 3: Cross multiply
    306,314.58x = 459,004.08 × 128,724.51
  4. Step 4: Simplify right side
    306,314.58x = 59,085,075,286.00
  5. Step 5: Solve for x
    x = 59,085,075,286.00/306,314.58
  6. Step 6: Final answer
    x = 192,890.18

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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.