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Finding the Fourth Proportional to 245,442.62, 338,698.42 and 138,006.25

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Solution

The fourth proportional to 245,442.62, 338,698.42 and 138,006.25 is: 190,441.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,442.62 : 338,698.42 = 138,006.25 : x
  2. Step 2: Convert to fraction form
    245,442.62/338,698.42 = 138,006.25/x
  3. Step 3: Cross multiply
    245,442.62x = 338,698.42 × 138,006.25
  4. Step 4: Simplify right side
    245,442.62x = 46,742,497,633.36
  5. Step 5: Solve for x
    x = 46,742,497,633.36/245,442.62
  6. Step 6: Final answer
    x = 190,441.65

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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.