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Finding the Fourth Proportional to 245,368.36, 338,608.38 and 137,938.60

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Solution

The fourth proportional to 245,368.36, 338,608.38 and 137,938.60 is: 190,355.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,368.36 : 338,608.38 = 137,938.60 : x
  2. Step 2: Convert to fraction form
    245,368.36/338,608.38 = 137,938.60/x
  3. Step 3: Cross multiply
    245,368.36x = 338,608.38 × 137,938.60
  4. Step 4: Simplify right side
    245,368.36x = 46,707,165,885.47
  5. Step 5: Solve for x
    x = 46,707,165,885.47/245,368.36
  6. Step 6: Final answer
    x = 190,355.29

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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.