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Finding the Fourth Proportional to 554,390.51, 765,058.76 and 312,672.56

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Solution

The fourth proportional to 554,390.51, 765,058.76 and 312,672.56 is: 431,488.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,390.51 : 765,058.76 = 312,672.56 : x
  2. Step 2: Convert to fraction form
    554,390.51/765,058.76 = 312,672.56/x
  3. Step 3: Cross multiply
    554,390.51x = 765,058.76 × 312,672.56
  4. Step 4: Simplify right side
    554,390.51x = 239,212,875,650.97
  5. Step 5: Solve for x
    x = 239,212,875,650.97/554,390.51
  6. Step 6: Final answer
    x = 431,488.05

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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.