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Finding the Fourth Proportional to 427,226.70, 640,980.34 and 174,719.55

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Solution

The fourth proportional to 427,226.70, 640,980.34 and 174,719.55 is: 262,136.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,226.70 : 640,980.34 = 174,719.55 : x
  2. Step 2: Convert to fraction form
    427,226.70/640,980.34 = 174,719.55/x
  3. Step 3: Cross multiply
    427,226.70x = 640,980.34 × 174,719.55
  4. Step 4: Simplify right side
    427,226.70x = 111,991,796,563.65
  5. Step 5: Solve for x
    x = 111,991,796,563.65/427,226.70
  6. Step 6: Final answer
    x = 262,136.70

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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.