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Finding the Fourth Proportional to 405,998.40, 608,738.40 and 169,435.20

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Solution

The fourth proportional to 405,998.40, 608,738.40 and 169,435.20 is: 254,044.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,998.40 : 608,738.40 = 169,435.20 : x
  2. Step 2: Convert to fraction form
    405,998.40/608,738.40 = 169,435.20/x
  3. Step 3: Cross multiply
    405,998.40x = 608,738.40 × 169,435.20
  4. Step 4: Simplify right side
    405,998.40x = 103,141,712,551.68
  5. Step 5: Solve for x
    x = 103,141,712,551.68/405,998.40
  6. Step 6: Final answer
    x = 254,044.63

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1.5x scale

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.