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Finding the Fourth Proportional to 398,768.40, 550,484.67 and 245,833.92

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Solution

The fourth proportional to 398,768.40, 550,484.67 and 245,833.92 is: 339,364.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,768.40 : 550,484.67 = 245,833.92 : x
  2. Step 2: Convert to fraction form
    398,768.40/550,484.67 = 245,833.92/x
  3. Step 3: Cross multiply
    398,768.40x = 550,484.67 × 245,833.92
  4. Step 4: Simplify right side
    398,768.40x = 135,327,804,326.01
  5. Step 5: Solve for x
    x = 135,327,804,326.01/398,768.40
  6. Step 6: Final answer
    x = 339,364.41

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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.