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Finding the Fourth Proportional to 439,468.80, 659,164.80 and 143,980.80

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Solution

The fourth proportional to 439,468.80, 659,164.80 and 143,980.80 is: 215,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,468.80 : 659,164.80 = 143,980.80 : x
  2. Step 2: Convert to fraction form
    439,468.80/659,164.80 = 143,980.80/x
  3. Step 3: Cross multiply
    439,468.80x = 659,164.80 × 143,980.80
  4. Step 4: Simplify right side
    439,468.80x = 94,907,075,235.84
  5. Step 5: Solve for x
    x = 94,907,075,235.84/439,468.80
  6. Step 6: Final answer
    x = 215,958.62

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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.