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Finding the Fourth Proportional to 405,881.35, 608,828.91 and 121,505.74

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Solution

The fourth proportional to 405,881.35, 608,828.91 and 121,505.74 is: 182,260.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,881.35 : 608,828.91 = 121,505.74 : x
  2. Step 2: Convert to fraction form
    405,881.35/608,828.91 = 121,505.74/x
  3. Step 3: Cross multiply
    405,881.35x = 608,828.91 × 121,505.74
  4. Step 4: Simplify right side
    405,881.35x = 73,976,207,242.94
  5. Step 5: Solve for x
    x = 73,976,207,242.94/405,881.35
  6. Step 6: Final answer
    x = 182,260.67

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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.