Home / 305,347.20-421,381.67-169,390.05

Finding the Fourth Proportional to 305,347.20, 421,381.67 and 169,390.05

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Solution

The fourth proportional to 305,347.20, 421,381.67 and 169,390.05 is: 233,759.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,347.20 : 421,381.67 = 169,390.05 : x
  2. Step 2: Convert to fraction form
    305,347.20/421,381.67 = 169,390.05/x
  3. Step 3: Cross multiply
    305,347.20x = 421,381.67 × 169,390.05
  4. Step 4: Simplify right side
    305,347.20x = 71,377,861,303.43
  5. Step 5: Solve for x
    x = 71,377,861,303.43/305,347.20
  6. Step 6: Final answer
    x = 233,759.67

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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.