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Finding the Fourth Proportional to 309,479.75, 427,158.01 and 188,687.63

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Solution

The fourth proportional to 309,479.75, 427,158.01 and 188,687.63 is: 260,435.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,479.75 : 427,158.01 = 188,687.63 : x
  2. Step 2: Convert to fraction form
    309,479.75/427,158.01 = 188,687.63/x
  3. Step 3: Cross multiply
    309,479.75x = 427,158.01 × 188,687.63
  4. Step 4: Simplify right side
    309,479.75x = 80,599,432,244.33
  5. Step 5: Solve for x
    x = 80,599,432,244.33/309,479.75
  6. Step 6: Final answer
    x = 260,435.24

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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.