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Finding the Fourth Proportional to 353,455.40, 530,183.10 and 213,487.40

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Solution

The fourth proportional to 353,455.40, 530,183.10 and 213,487.40 is: 320,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,455.40 : 530,183.10 = 213,487.40 : x
  2. Step 2: Convert to fraction form
    353,455.40/530,183.10 = 213,487.40/x
  3. Step 3: Cross multiply
    353,455.40x = 530,183.10 × 213,487.40
  4. Step 4: Simplify right side
    353,455.40x = 113,187,411,542.94
  5. Step 5: Solve for x
    x = 113,187,411,542.94/353,455.40
  6. Step 6: Final answer
    x = 320,231.10

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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.