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Finding the Fourth Proportional to 309,608.87, 427,218.91 and 171,785.59

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Solution

The fourth proportional to 309,608.87, 427,218.91 and 171,785.59 is: 237,041.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,608.87 : 427,218.91 = 171,785.59 : x
  2. Step 2: Convert to fraction form
    309,608.87/427,218.91 = 171,785.59/x
  3. Step 3: Cross multiply
    309,608.87x = 427,218.91 × 171,785.59
  4. Step 4: Simplify right side
    309,608.87x = 73,390,051,654.58
  5. Step 5: Solve for x
    x = 73,390,051,654.58/309,608.87
  6. Step 6: Final answer
    x = 237,041.18

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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.