Home / 305,120.21-421,090.74-169,196.77

Finding the Fourth Proportional to 305,120.21, 421,090.74 and 169,196.77

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Solution

The fourth proportional to 305,120.21, 421,090.74 and 169,196.77 is: 233,505.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,120.21 : 421,090.74 = 169,196.77 : x
  2. Step 2: Convert to fraction form
    305,120.21/421,090.74 = 169,196.77/x
  3. Step 3: Cross multiply
    305,120.21x = 421,090.74 × 169,196.77
  4. Step 4: Simplify right side
    305,120.21x = 71,247,192,032.18
  5. Step 5: Solve for x
    x = 71,247,192,032.18/305,120.21
  6. Step 6: Final answer
    x = 233,505.32

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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.