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Finding the Fourth Proportional to 275,630.42, 380,409.30 and 154,779.93

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Solution

The fourth proportional to 275,630.42, 380,409.30 and 154,779.93 is: 213,618.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,630.42 : 380,409.30 = 154,779.93 : x
  2. Step 2: Convert to fraction form
    275,630.42/380,409.30 = 154,779.93/x
  3. Step 3: Cross multiply
    275,630.42x = 380,409.30 × 154,779.93
  4. Step 4: Simplify right side
    275,630.42x = 58,879,724,825.35
  5. Step 5: Solve for x
    x = 58,879,724,825.35/275,630.42
  6. Step 6: Final answer
    x = 213,618.39

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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.