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Finding the Fourth Proportional to 355,311.34, 490,327.84 and 210,169.26

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Solution

The fourth proportional to 355,311.34, 490,327.84 and 210,169.26 is: 290,032.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,311.34 : 490,327.84 = 210,169.26 : x
  2. Step 2: Convert to fraction form
    355,311.34/490,327.84 = 210,169.26/x
  3. Step 3: Cross multiply
    355,311.34x = 490,327.84 × 210,169.26
  4. Step 4: Simplify right side
    355,311.34x = 103,051,839,990.60
  5. Step 5: Solve for x
    x = 103,051,839,990.60/355,311.34
  6. Step 6: Final answer
    x = 290,032.51

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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.