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Finding the Fourth Proportional to 279,486.35, 385,678.46 and 152,161.67

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Solution

The fourth proportional to 279,486.35, 385,678.46 and 152,161.67 is: 209,976.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,486.35 : 385,678.46 = 152,161.67 : x
  2. Step 2: Convert to fraction form
    279,486.35/385,678.46 = 152,161.67/x
  3. Step 3: Cross multiply
    279,486.35x = 385,678.46 × 152,161.67
  4. Step 4: Simplify right side
    279,486.35x = 58,685,477,795.82
  5. Step 5: Solve for x
    x = 58,685,477,795.82/279,486.35
  6. Step 6: Final answer
    x = 209,976.19

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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.