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Finding the Fourth Proportional to 421,480.37, 632,469.67 and 155,427.72

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Solution

The fourth proportional to 421,480.37, 632,469.67 and 155,427.72 is: 233,233.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,480.37 : 632,469.67 = 155,427.72 : x
  2. Step 2: Convert to fraction form
    421,480.37/632,469.67 = 155,427.72/x
  3. Step 3: Cross multiply
    421,480.37x = 632,469.67 × 155,427.72
  4. Step 4: Simplify right side
    421,480.37x = 98,303,318,777.25
  5. Step 5: Solve for x
    x = 98,303,318,777.25/421,480.37
  6. Step 6: Final answer
    x = 233,233.45

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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.