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Finding the Fourth Proportional to 305,333.64, 421,360.79 and 178,033.84

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Solution

The fourth proportional to 305,333.64, 421,360.79 and 178,033.84 is: 245,686.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,333.64 : 421,360.79 = 178,033.84 : x
  2. Step 2: Convert to fraction form
    305,333.64/421,360.79 = 178,033.84/x
  3. Step 3: Cross multiply
    305,333.64x = 421,360.79 × 178,033.84
  4. Step 4: Simplify right side
    305,333.64x = 75,016,477,525.56
  5. Step 5: Solve for x
    x = 75,016,477,525.56/305,333.64
  6. Step 6: Final answer
    x = 245,686.91

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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.