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Finding the Fourth Proportional to 405,988.40, 608,723.40 and 169,425.20

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Solution

The fourth proportional to 405,988.40, 608,723.40 and 169,425.20 is: 254,029.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,988.40 : 608,723.40 = 169,425.20 : x
  2. Step 2: Convert to fraction form
    405,988.40/608,723.40 = 169,425.20/x
  3. Step 3: Cross multiply
    405,988.40x = 608,723.40 × 169,425.20
  4. Step 4: Simplify right side
    405,988.40x = 103,133,083,789.68
  5. Step 5: Solve for x
    x = 103,133,083,789.68/405,988.40
  6. Step 6: Final answer
    x = 254,029.63

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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.