Home / 398,820.13-598,100.79-132,509.14

Finding the Fourth Proportional to 398,820.13, 598,100.79 and 132,509.14

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Solution

The fourth proportional to 398,820.13, 598,100.79 and 132,509.14 is: 198,720.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,820.13 : 598,100.79 = 132,509.14 : x
  2. Step 2: Convert to fraction form
    398,820.13/598,100.79 = 132,509.14/x
  3. Step 3: Cross multiply
    398,820.13x = 598,100.79 × 132,509.14
  4. Step 4: Simplify right side
    398,820.13x = 79,253,821,316.22
  5. Step 5: Solve for x
    x = 79,253,821,316.22/398,820.13
  6. Step 6: Final answer
    x = 198,720.71

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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.