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Finding the Fourth Proportional to 421,679.58, 632,604.03 and 155,441.46

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Solution

The fourth proportional to 421,679.58, 632,604.03 and 155,441.46 is: 233,193.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,679.58 : 632,604.03 = 155,441.46 : x
  2. Step 2: Convert to fraction form
    421,679.58/632,604.03 = 155,441.46/x
  3. Step 3: Cross multiply
    421,679.58x = 632,604.03 × 155,441.46
  4. Step 4: Simplify right side
    421,679.58x = 98,332,894,025.08
  5. Step 5: Solve for x
    x = 98,332,894,025.08/421,679.58
  6. Step 6: Final answer
    x = 233,193.40

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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.