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Finding the Fourth Proportional to 361,879.20, 542,818.80 and 328,636.80

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Solution

The fourth proportional to 361,879.20, 542,818.80 and 328,636.80 is: 492,955.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,879.20 : 542,818.80 = 328,636.80 : x
  2. Step 2: Convert to fraction form
    361,879.20/542,818.80 = 328,636.80/x
  3. Step 3: Cross multiply
    361,879.20x = 542,818.80 × 328,636.80
  4. Step 4: Simplify right side
    361,879.20x = 178,390,233,411.84
  5. Step 5: Solve for x
    x = 178,390,233,411.84/361,879.20
  6. Step 6: Final answer
    x = 492,955.20

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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.