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Finding the Fourth Proportional to 353,307.60, 529,183.80 and 212,821.20

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Solution

The fourth proportional to 353,307.60, 529,183.80 and 212,821.20 is: 318,763.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,307.60 : 529,183.80 = 212,821.20 : x
  2. Step 2: Convert to fraction form
    353,307.60/529,183.80 = 212,821.20/x
  3. Step 3: Cross multiply
    353,307.60x = 529,183.80 × 212,821.20
  4. Step 4: Simplify right side
    353,307.60x = 112,621,531,336.56
  5. Step 5: Solve for x
    x = 112,621,531,336.56/353,307.60
  6. Step 6: Final answer
    x = 318,763.40

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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.