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Finding the Fourth Proportional to 355,825.63, 490,990.87 and 212,555.26

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Solution

The fourth proportional to 355,825.63, 490,990.87 and 212,555.26 is: 293,297.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,825.63 : 490,990.87 = 212,555.26 : x
  2. Step 2: Convert to fraction form
    355,825.63/490,990.87 = 212,555.26/x
  3. Step 3: Cross multiply
    355,825.63x = 490,990.87 × 212,555.26
  4. Step 4: Simplify right side
    355,825.63x = 104,362,692,030.48
  5. Step 5: Solve for x
    x = 104,362,692,030.48/355,825.63
  6. Step 6: Final answer
    x = 293,297.29

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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.