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Finding the Fourth Proportional to 398,620.60, 550,075.57 and 226,515.55

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Solution

The fourth proportional to 398,620.60, 550,075.57 and 226,515.55 is: 312,579.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,620.60 : 550,075.57 = 226,515.55 : x
  2. Step 2: Convert to fraction form
    398,620.60/550,075.57 = 226,515.55/x
  3. Step 3: Cross multiply
    398,620.60x = 550,075.57 × 226,515.55
  4. Step 4: Simplify right side
    398,620.60x = 124,600,670,280.11
  5. Step 5: Solve for x
    x = 124,600,670,280.11/398,620.60
  6. Step 6: Final answer
    x = 312,579.61

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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.