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Finding the Fourth Proportional to 380,751.80, 525,676.32 and 245,021.58

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Solution

The fourth proportional to 380,751.80, 525,676.32 and 245,021.58 is: 338,283.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,751.80 : 525,676.32 = 245,021.58 : x
  2. Step 2: Convert to fraction form
    380,751.80/525,676.32 = 245,021.58/x
  3. Step 3: Cross multiply
    380,751.80x = 525,676.32 × 245,021.58
  4. Step 4: Simplify right side
    380,751.80x = 128,802,042,494.99
  5. Step 5: Solve for x
    x = 128,802,042,494.99/380,751.80
  6. Step 6: Final answer
    x = 338,283.48

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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.