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Finding the Fourth Proportional to 389,889.33, 583,503.33 and 326,780.72

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Solution

The fourth proportional to 389,889.33, 583,503.33 and 326,780.72 is: 489,055.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,889.33 : 583,503.33 = 326,780.72 : x
  2. Step 2: Convert to fraction form
    389,889.33/583,503.33 = 326,780.72/x
  3. Step 3: Cross multiply
    389,889.33x = 583,503.33 × 326,780.72
  4. Step 4: Simplify right side
    389,889.33x = 190,677,635,382.28
  5. Step 5: Solve for x
    x = 190,677,635,382.28/389,889.33
  6. Step 6: Final answer
    x = 489,055.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.