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Finding the Fourth Proportional to 309,481.25, 427,160.08 and 188,689.13

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Solution

The fourth proportional to 309,481.25, 427,160.08 and 188,689.13 is: 260,437.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,481.25 : 427,160.08 = 188,689.13 : x
  2. Step 2: Convert to fraction form
    309,481.25/427,160.08 = 188,689.13/x
  3. Step 3: Cross multiply
    309,481.25x = 427,160.08 × 188,689.13
  4. Step 4: Simplify right side
    309,481.25x = 80,600,463,567.84
  5. Step 5: Solve for x
    x = 80,600,463,567.84/309,481.25
  6. Step 6: Final answer
    x = 260,437.31

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1.5x scale

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.