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Finding the Fourth Proportional to 554,390.25, 765,058.41 and 312,672.31

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Solution

The fourth proportional to 554,390.25, 765,058.41 and 312,672.31 is: 431,487.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,390.25 : 765,058.41 = 312,672.31 : x
  2. Step 2: Convert to fraction form
    554,390.25/765,058.41 = 312,672.31/x
  3. Step 3: Cross multiply
    554,390.25x = 765,058.41 × 312,672.31
  4. Step 4: Simplify right side
    554,390.25x = 239,212,580,339.63
  5. Step 5: Solve for x
    x = 239,212,580,339.63/554,390.25
  6. Step 6: Final answer
    x = 431,487.71

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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.