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Finding the Fourth Proportional to 353,932.40, 530,898.60 and 318,940.40

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Solution

The fourth proportional to 353,932.40, 530,898.60 and 318,940.40 is: 478,410.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,932.40 : 530,898.60 = 318,940.40 : x
  2. Step 2: Convert to fraction form
    353,932.40/530,898.60 = 318,940.40/x
  3. Step 3: Cross multiply
    353,932.40x = 530,898.60 × 318,940.40
  4. Step 4: Simplify right side
    353,932.40x = 169,325,011,843.44
  5. Step 5: Solve for x
    x = 169,325,011,843.44/353,932.40
  6. Step 6: Final answer
    x = 478,410.60

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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.