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Finding the Fourth Proportional to 398,771.78, 550,264.66 and 245,785.46

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Solution

The fourth proportional to 398,771.78, 550,264.66 and 245,785.46 is: 339,159.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,771.78 : 550,264.66 = 245,785.46 : x
  2. Step 2: Convert to fraction form
    398,771.78/550,264.66 = 245,785.46/x
  3. Step 3: Cross multiply
    398,771.78x = 550,264.66 × 245,785.46
  4. Step 4: Simplify right side
    398,771.78x = 135,247,049,214.06
  5. Step 5: Solve for x
    x = 135,247,049,214.06/398,771.78
  6. Step 6: Final answer
    x = 339,159.03

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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.