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Finding the Fourth Proportional to 245,469.90, 338,708.94 and 138,033.53

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Solution

The fourth proportional to 245,469.90, 338,708.94 and 138,033.53 is: 190,464.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,469.90 : 338,708.94 = 138,033.53 : x
  2. Step 2: Convert to fraction form
    245,469.90/338,708.94 = 138,033.53/x
  3. Step 3: Cross multiply
    245,469.90x = 338,708.94 × 138,033.53
  4. Step 4: Simplify right side
    245,469.90x = 46,753,190,630.76
  5. Step 5: Solve for x
    x = 46,753,190,630.76/245,469.90
  6. Step 6: Final answer
    x = 190,464.05

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1.5x scale

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.