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Finding the Fourth Proportional to 405,422.60, 608,133.90 and 168,686.60

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Solution

The fourth proportional to 405,422.60, 608,133.90 and 168,686.60 is: 253,029.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,422.60 : 608,133.90 = 168,686.60 : x
  2. Step 2: Convert to fraction form
    405,422.60/608,133.90 = 168,686.60/x
  3. Step 3: Cross multiply
    405,422.60x = 608,133.90 × 168,686.60
  4. Step 4: Simplify right side
    405,422.60x = 102,584,039,935.74
  5. Step 5: Solve for x
    x = 102,584,039,935.74/405,422.60
  6. Step 6: Final answer
    x = 253,029.90

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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.