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Finding the Fourth Proportional to 405,639.60, 608,459.40 and 168,903.60

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Solution

The fourth proportional to 405,639.60, 608,459.40 and 168,903.60 is: 253,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,639.60 : 608,459.40 = 168,903.60 : x
  2. Step 2: Convert to fraction form
    405,639.60/608,459.40 = 168,903.60/x
  3. Step 3: Cross multiply
    405,639.60x = 608,459.40 × 168,903.60
  4. Step 4: Simplify right side
    405,639.60x = 102,770,983,113.84
  5. Step 5: Solve for x
    x = 102,770,983,113.84/405,639.60
  6. Step 6: Final answer
    x = 253,355.40

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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.