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Finding the Fourth Proportional to 290,091.80, 434,619.30 and 248,619.80

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Solution

The fourth proportional to 290,091.80, 434,619.30 and 248,619.80 is: 372,485.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,091.80 : 434,619.30 = 248,619.80 : x
  2. Step 2: Convert to fraction form
    290,091.80/434,619.30 = 248,619.80/x
  3. Step 3: Cross multiply
    290,091.80x = 434,619.30 × 248,619.80
  4. Step 4: Simplify right side
    290,091.80x = 108,054,963,442.14
  5. Step 5: Solve for x
    x = 108,054,963,442.14/290,091.80
  6. Step 6: Final answer
    x = 372,485.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.