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Finding the Fourth Proportional to 398,780.94, 550,006.52 and 255,554.31

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Solution

The fourth proportional to 398,780.94, 550,006.52 and 255,554.31 is: 352,465.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,780.94 : 550,006.52 = 255,554.31 : x
  2. Step 2: Convert to fraction form
    398,780.94/550,006.52 = 255,554.31/x
  3. Step 3: Cross multiply
    398,780.94x = 550,006.52 × 255,554.31
  4. Step 4: Simplify right side
    398,780.94x = 140,556,535,436.33
  5. Step 5: Solve for x
    x = 140,556,535,436.33/398,780.94
  6. Step 6: Final answer
    x = 352,465.53

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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.