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Finding the Fourth Proportional to 353,297.60, 529,255.20 and 212,638.40

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Solution

The fourth proportional to 353,297.60, 529,255.20 and 212,638.40 is: 318,541.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,297.60 : 529,255.20 = 212,638.40 : x
  2. Step 2: Convert to fraction form
    353,297.60/529,255.20 = 212,638.40/x
  3. Step 3: Cross multiply
    353,297.60x = 529,255.20 × 212,638.40
  4. Step 4: Simplify right side
    353,297.60x = 112,539,978,919.68
  5. Step 5: Solve for x
    x = 112,539,978,919.68/353,297.60
  6. Step 6: Final answer
    x = 318,541.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.