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Finding the Fourth Proportional to 421,973.54, 632,960.30 and 126,485.54

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Solution

The fourth proportional to 421,973.54, 632,960.30 and 126,485.54 is: 189,728.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,973.54 : 632,960.30 = 126,485.54 : x
  2. Step 2: Convert to fraction form
    421,973.54/632,960.30 = 126,485.54/x
  3. Step 3: Cross multiply
    421,973.54x = 632,960.30 × 126,485.54
  4. Step 4: Simplify right side
    421,973.54x = 80,060,321,546.83
  5. Step 5: Solve for x
    x = 80,060,321,546.83/421,973.54
  6. Step 6: Final answer
    x = 189,728.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.