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Finding the Fourth Proportional to 245,442.36, 338,698.08 and 138,005.98

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Solution

The fourth proportional to 245,442.36, 338,698.08 and 138,005.98 is: 190,441.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,442.36 : 338,698.08 = 138,005.98 : x
  2. Step 2: Convert to fraction form
    245,442.36/338,698.08 = 138,005.98/x
  3. Step 3: Cross multiply
    245,442.36x = 338,698.08 × 138,005.98
  4. Step 4: Simplify right side
    245,442.36x = 46,742,360,454.52
  5. Step 5: Solve for x
    x = 46,742,360,454.52/245,442.36
  6. Step 6: Final answer
    x = 190,441.29

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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.