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Finding the Fourth Proportional to 421,501.39, 631,956.33 and 155,227.73

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Solution

The fourth proportional to 421,501.39, 631,956.33 and 155,227.73 is: 232,732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,501.39 : 631,956.33 = 155,227.73 : x
  2. Step 2: Convert to fraction form
    421,501.39/631,956.33 = 155,227.73/x
  3. Step 3: Cross multiply
    421,501.39x = 631,956.33 × 155,227.73
  4. Step 4: Simplify right side
    421,501.39x = 98,097,143,405.25
  5. Step 5: Solve for x
    x = 98,097,143,405.25/421,501.39
  6. Step 6: Final answer
    x = 232,732.67

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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.