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Finding the Fourth Proportional to 309,220.88, 427,583.76 and 245,447.96

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Solution

The fourth proportional to 309,220.88, 427,583.76 and 245,447.96 is: 339,399.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,220.88 : 427,583.76 = 245,447.96 : x
  2. Step 2: Convert to fraction form
    309,220.88/427,583.76 = 245,447.96/x
  3. Step 3: Cross multiply
    309,220.88x = 427,583.76 × 245,447.96
  4. Step 4: Simplify right side
    309,220.88x = 104,949,561,621.13
  5. Step 5: Solve for x
    x = 104,949,561,621.13/309,220.88
  6. Step 6: Final answer
    x = 339,399.98

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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.