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Finding the Fourth Proportional to 305,622.54, 421,771.32 and 167,806.98

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Solution

The fourth proportional to 305,622.54, 421,771.32 and 167,806.98 is: 231,580.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,622.54 : 421,771.32 = 167,806.98 : x
  2. Step 2: Convert to fraction form
    305,622.54/421,771.32 = 167,806.98/x
  3. Step 3: Cross multiply
    305,622.54x = 421,771.32 × 167,806.98
  4. Step 4: Simplify right side
    305,622.54x = 70,776,171,459.81
  5. Step 5: Solve for x
    x = 70,776,171,459.81/305,622.54
  6. Step 6: Final answer
    x = 231,580.34

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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.