Home / 398,821.64-598,348.29-128,944.02

Finding the Fourth Proportional to 398,821.64, 598,348.29 and 128,944.02

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Solution

The fourth proportional to 398,821.64, 598,348.29 and 128,944.02 is: 193,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,821.64 : 598,348.29 = 128,944.02 : x
  2. Step 2: Convert to fraction form
    398,821.64/598,348.29 = 128,944.02/x
  3. Step 3: Cross multiply
    398,821.64x = 598,348.29 × 128,944.02
  4. Step 4: Simplify right side
    398,821.64x = 77,153,433,872.73
  5. Step 5: Solve for x
    x = 77,153,433,872.73/398,821.64
  6. Step 6: Final answer
    x = 193,453.48

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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.