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Finding the Fourth Proportional to 309,411.96, 426,980.79 and 171,590.08

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Solution

The fourth proportional to 309,411.96, 426,980.79 and 171,590.08 is: 236,790.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,411.96 : 426,980.79 = 171,590.08 : x
  2. Step 2: Convert to fraction form
    309,411.96/426,980.79 = 171,590.08/x
  3. Step 3: Cross multiply
    309,411.96x = 426,980.79 × 171,590.08
  4. Step 4: Simplify right side
    309,411.96x = 73,265,667,914.56
  5. Step 5: Solve for x
    x = 73,265,667,914.56/309,411.96
  6. Step 6: Final answer
    x = 236,790.04

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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.