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Finding the Fourth Proportional to 309,661.20, 427,337.10 and 173,725.20

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Solution

The fourth proportional to 309,661.20, 427,337.10 and 173,725.20 is: 239,743.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,661.20 : 427,337.10 = 173,725.20 : x
  2. Step 2: Convert to fraction form
    309,661.20/427,337.10 = 173,725.20/x
  3. Step 3: Cross multiply
    309,661.20x = 427,337.10 × 173,725.20
  4. Step 4: Simplify right side
    309,661.20x = 74,239,223,164.92
  5. Step 5: Solve for x
    x = 74,239,223,164.92/309,661.20
  6. Step 6: Final answer
    x = 239,743.38

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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.