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Finding the Fourth Proportional to 305,099.26, 421,051.26 and 190,445.78

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Solution

The fourth proportional to 305,099.26, 421,051.26 and 190,445.78 is: 262,824.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,099.26 : 421,051.26 = 190,445.78 : x
  2. Step 2: Convert to fraction form
    305,099.26/421,051.26 = 190,445.78/x
  3. Step 3: Cross multiply
    305,099.26x = 421,051.26 × 190,445.78
  4. Step 4: Simplify right side
    305,099.26x = 80,187,437,397.48
  5. Step 5: Solve for x
    x = 80,187,437,397.48/305,099.26
  6. Step 6: Final answer
    x = 262,824.10

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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.