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Finding the Fourth Proportional to 321,907.80, 482,775.30 and 134,880.60

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Solution

The fourth proportional to 321,907.80, 482,775.30 and 134,880.60 is: 202,284.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,907.80 : 482,775.30 = 134,880.60 : x
  2. Step 2: Convert to fraction form
    321,907.80/482,775.30 = 134,880.60/x
  3. Step 3: Cross multiply
    321,907.80x = 482,775.30 × 134,880.60
  4. Step 4: Simplify right side
    321,907.80x = 65,117,022,129.18
  5. Step 5: Solve for x
    x = 65,117,022,129.18/321,907.80
  6. Step 6: Final answer
    x = 202,284.70

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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.