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Finding the Fourth Proportional to 278,389.85, 384,185.43 and 151,065.54

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Solution

The fourth proportional to 278,389.85, 384,185.43 and 151,065.54 is: 208,474.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,389.85 : 384,185.43 = 151,065.54 : x
  2. Step 2: Convert to fraction form
    278,389.85/384,185.43 = 151,065.54/x
  3. Step 3: Cross multiply
    278,389.85x = 384,185.43 × 151,065.54
  4. Step 4: Simplify right side
    278,389.85x = 58,037,179,443.08
  5. Step 5: Solve for x
    x = 58,037,179,443.08/278,389.85
  6. Step 6: Final answer
    x = 208,474.48

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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.