Home / 309,819.21-427,515.78-173,824.89

Finding the Fourth Proportional to 309,819.21, 427,515.78 and 173,824.89

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Solution

The fourth proportional to 309,819.21, 427,515.78 and 173,824.89 is: 239,858.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,819.21 : 427,515.78 = 173,824.89 : x
  2. Step 2: Convert to fraction form
    309,819.21/427,515.78 = 173,824.89/x
  3. Step 3: Cross multiply
    309,819.21x = 427,515.78 × 173,824.89
  4. Step 4: Simplify right side
    309,819.21x = 74,312,883,431.76
  5. Step 5: Solve for x
    x = 74,312,883,431.76/309,819.21
  6. Step 6: Final answer
    x = 239,858.86

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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.