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Finding the Fourth Proportional to 309,611.82, 427,268.90 and 180,546.70

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Solution

The fourth proportional to 309,611.82, 427,268.90 and 180,546.70 is: 249,157.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,611.82 : 427,268.90 = 180,546.70 : x
  2. Step 2: Convert to fraction form
    309,611.82/427,268.90 = 180,546.70/x
  3. Step 3: Cross multiply
    309,611.82x = 427,268.90 × 180,546.70
  4. Step 4: Simplify right side
    309,611.82x = 77,141,989,907.63
  5. Step 5: Solve for x
    x = 77,141,989,907.63/309,611.82
  6. Step 6: Final answer
    x = 249,157.12

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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.