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Finding the Fourth Proportional to 2,158,558.58, 2,978,795.42 and 1,178,497.58

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Solution

The fourth proportional to 2,158,558.58, 2,978,795.42 and 1,178,497.58 is: 1,626,318.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,158,558.58 : 2,978,795.42 = 1,178,497.58 : x
  2. Step 2: Convert to fraction form
    2,158,558.58/2,978,795.42 = 1,178,497.58/x
  3. Step 3: Cross multiply
    2,158,558.58x = 2,978,795.42 × 1,178,497.58
  4. Step 4: Simplify right side
    2,158,558.58x = 3,510,503,183,309.81
  5. Step 5: Solve for x
    x = 3,510,503,183,309.81/2,158,558.58
  6. Step 6: Final answer
    x = 1,626,318.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.