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Finding the Fourth Proportional to 393,771.22, 543,369.87 and 219,328.30

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Solution

The fourth proportional to 393,771.22, 543,369.87 and 219,328.30 is: 302,653.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,771.22 : 543,369.87 = 219,328.30 : x
  2. Step 2: Convert to fraction form
    393,771.22/543,369.87 = 219,328.30/x
  3. Step 3: Cross multiply
    393,771.22x = 543,369.87 × 219,328.30
  4. Step 4: Simplify right side
    393,771.22x = 119,176,389,858.32
  5. Step 5: Solve for x
    x = 119,176,389,858.32/393,771.22
  6. Step 6: Final answer
    x = 302,653.89

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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.