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Finding the Fourth Proportional to 355,578.56, 490,724.16 and 212,344.64

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Solution

The fourth proportional to 355,578.56, 490,724.16 and 212,344.64 is: 293,050.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,578.56 : 490,724.16 = 212,344.64 : x
  2. Step 2: Convert to fraction form
    355,578.56/490,724.16 = 212,344.64/x
  3. Step 3: Cross multiply
    355,578.56x = 490,724.16 × 212,344.64
  4. Step 4: Simplify right side
    355,578.56x = 104,202,645,094.50
  5. Step 5: Solve for x
    x = 104,202,645,094.50/355,578.56
  6. Step 6: Final answer
    x = 293,050.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.