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Finding the Fourth Proportional to 393,489.88, 590,240.08 and 123,609.22

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Solution

The fourth proportional to 393,489.88, 590,240.08 and 123,609.22 is: 185,415.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,489.88 : 590,240.08 = 123,609.22 : x
  2. Step 2: Convert to fraction form
    393,489.88/590,240.08 = 123,609.22/x
  3. Step 3: Cross multiply
    393,489.88x = 590,240.08 × 123,609.22
  4. Step 4: Simplify right side
    393,489.88x = 72,959,112,950.34
  5. Step 5: Solve for x
    x = 72,959,112,950.34/393,489.88
  6. Step 6: Final answer
    x = 185,415.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.