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Finding the Fourth Proportional to 355,589.10, 490,672.68 and 210,399.30

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Solution

The fourth proportional to 355,589.10, 490,672.68 and 210,399.30 is: 290,327.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,589.10 : 490,672.68 = 210,399.30 : x
  2. Step 2: Convert to fraction form
    355,589.10/490,672.68 = 210,399.30/x
  3. Step 3: Cross multiply
    355,589.10x = 490,672.68 × 210,399.30
  4. Step 4: Simplify right side
    355,589.10x = 103,237,188,401.12
  5. Step 5: Solve for x
    x = 103,237,188,401.12/355,589.10
  6. Step 6: Final answer
    x = 290,327.20

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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.