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Finding the Fourth Proportional to 309,290.60, 426,820.68 and 173,325.62

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Solution

The fourth proportional to 309,290.60, 426,820.68 and 173,325.62 is: 239,189.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,290.60 : 426,820.68 = 173,325.62 : x
  2. Step 2: Convert to fraction form
    309,290.60/426,820.68 = 173,325.62/x
  3. Step 3: Cross multiply
    309,290.60x = 426,820.68 × 173,325.62
  4. Step 4: Simplify right side
    309,290.60x = 73,978,958,989.82
  5. Step 5: Solve for x
    x = 73,978,958,989.82/309,290.60
  6. Step 6: Final answer
    x = 239,189.16

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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.