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Finding the Fourth Proportional to 309,495.81, 427,290.57 and 202,245.33

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Solution

The fourth proportional to 309,495.81, 427,290.57 and 202,245.33 is: 279,220.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,495.81 : 427,290.57 = 202,245.33 : x
  2. Step 2: Convert to fraction form
    309,495.81/427,290.57 = 202,245.33/x
  3. Step 3: Cross multiply
    309,495.81x = 427,290.57 × 202,245.33
  4. Step 4: Simplify right side
    309,495.81x = 86,417,522,335.54
  5. Step 5: Solve for x
    x = 86,417,522,335.54/309,495.81
  6. Step 6: Final answer
    x = 279,220.33

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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.