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Finding the Fourth Proportional to 245,479.28, 338,763.42 and 138,048.35

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Solution

The fourth proportional to 245,479.28, 338,763.42 and 138,048.35 is: 190,507.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,479.28 : 338,763.42 = 138,048.35 : x
  2. Step 2: Convert to fraction form
    245,479.28/338,763.42 = 138,048.35/x
  3. Step 3: Cross multiply
    245,479.28x = 338,763.42 × 138,048.35
  4. Step 4: Simplify right side
    245,479.28x = 46,765,729,477.54
  5. Step 5: Solve for x
    x = 46,765,729,477.54/245,479.28
  6. Step 6: Final answer
    x = 190,507.85

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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.