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Finding the Fourth Proportional to 309,979.57, 427,771.58 and 174,013.78

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Solution

The fourth proportional to 309,979.57, 427,771.58 and 174,013.78 is: 240,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,979.57 : 427,771.58 = 174,013.78 : x
  2. Step 2: Convert to fraction form
    309,979.57/427,771.58 = 174,013.78/x
  3. Step 3: Cross multiply
    309,979.57x = 427,771.58 × 174,013.78
  4. Step 4: Simplify right side
    309,979.57x = 74,438,147,473.51
  5. Step 5: Solve for x
    x = 74,438,147,473.51/309,979.57
  6. Step 6: Final answer
    x = 240,138.89

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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.