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Finding the Fourth Proportional to 355,811.49, 490,971.39 and 212,541.12

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Solution

The fourth proportional to 355,811.49, 490,971.39 and 212,541.12 is: 293,277.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,811.49 : 490,971.39 = 212,541.12 : x
  2. Step 2: Convert to fraction form
    355,811.49/490,971.39 = 212,541.12/x
  3. Step 3: Cross multiply
    355,811.49x = 490,971.39 × 212,541.12
  4. Step 4: Simplify right side
    355,811.49x = 104,351,609,118.56
  5. Step 5: Solve for x
    x = 104,351,609,118.56/355,811.49
  6. Step 6: Final answer
    x = 293,277.79

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1.5x scale

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.