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Finding the Fourth Proportional to 245,828.63, 339,290.62 and 138,398.67

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Solution

The fourth proportional to 245,828.63, 339,290.62 and 138,398.67 is: 191,016.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,828.63 : 339,290.62 = 138,398.67 : x
  2. Step 2: Convert to fraction form
    245,828.63/339,290.62 = 138,398.67/x
  3. Step 3: Cross multiply
    245,828.63x = 339,290.62 × 138,398.67
  4. Step 4: Simplify right side
    245,828.63x = 46,957,370,205.48
  5. Step 5: Solve for x
    x = 46,957,370,205.48/245,828.63
  6. Step 6: Final answer
    x = 191,016.69

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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.