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Finding the Fourth Proportional to 405,978.21, 608,800.80 and 121,568.58

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Solution

The fourth proportional to 405,978.21, 608,800.80 and 121,568.58 is: 182,303.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,978.21 : 608,800.80 = 121,568.58 : x
  2. Step 2: Convert to fraction form
    405,978.21/608,800.80 = 121,568.58/x
  3. Step 3: Cross multiply
    405,978.21x = 608,800.80 × 121,568.58
  4. Step 4: Simplify right side
    405,978.21x = 74,011,048,758.86
  5. Step 5: Solve for x
    x = 74,011,048,758.86/405,978.21
  6. Step 6: Final answer
    x = 182,303.01

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.