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Finding the Fourth Proportional to 378,079, 521,743.44 and 216,930.52

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Solution

The fourth proportional to 378,079, 521,743.44 and 216,930.52 is: 299,360.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,079 : 521,743.44 = 216,930.52 : x
  2. Step 2: Convert to fraction form
    378,079/521,743.44 = 216,930.52/x
  3. Step 3: Cross multiply
    378,079x = 521,743.44 × 216,930.52
  4. Step 4: Simplify right side
    378,079x = 113,182,075,745.79
  5. Step 5: Solve for x
    x = 113,182,075,745.79/378,079
  6. Step 6: Final answer
    x = 299,360.92

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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.