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Finding the Fourth Proportional to 378,090.47, 521,600.92 and 225,042.84

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Solution

The fourth proportional to 378,090.47, 521,600.92 and 225,042.84 is: 310,461.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,090.47 : 521,600.92 = 225,042.84 : x
  2. Step 2: Convert to fraction form
    378,090.47/521,600.92 = 225,042.84/x
  3. Step 3: Cross multiply
    378,090.47x = 521,600.92 × 225,042.84
  4. Step 4: Simplify right side
    378,090.47x = 117,382,551,820.81
  5. Step 5: Solve for x
    x = 117,382,551,820.81/378,090.47
  6. Step 6: Final answer
    x = 310,461.54

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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.