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Finding the Fourth Proportional to 405,964.40, 608,687.40 and 169,401.20

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Solution

The fourth proportional to 405,964.40, 608,687.40 and 169,401.20 is: 253,993.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,964.40 : 608,687.40 = 169,401.20 : x
  2. Step 2: Convert to fraction form
    405,964.40/608,687.40 = 169,401.20/x
  3. Step 3: Cross multiply
    405,964.40x = 608,687.40 × 169,401.20
  4. Step 4: Simplify right side
    405,964.40x = 103,112,375,984.88
  5. Step 5: Solve for x
    x = 103,112,375,984.88/405,964.40
  6. Step 6: Final answer
    x = 253,993.64

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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.