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Finding the Fourth Proportional to 421,928.94, 632,812.77 and 126,440.94

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Solution

The fourth proportional to 421,928.94, 632,812.77 and 126,440.94 is: 189,637.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,928.94 : 632,812.77 = 126,440.94 : x
  2. Step 2: Convert to fraction form
    421,928.94/632,812.77 = 126,440.94/x
  3. Step 3: Cross multiply
    421,928.94x = 632,812.77 × 126,440.94
  4. Step 4: Simplify right side
    421,928.94x = 80,013,441,482.80
  5. Step 5: Solve for x
    x = 80,013,441,482.80/421,928.94
  6. Step 6: Final answer
    x = 189,637.24

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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.