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Finding the Fourth Proportional to 255,956.20, 383,930.70 and 115,714.60

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Solution

The fourth proportional to 255,956.20, 383,930.70 and 115,714.60 is: 173,570.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,956.20 : 383,930.70 = 115,714.60 : x
  2. Step 2: Convert to fraction form
    255,956.20/383,930.70 = 115,714.60/x
  3. Step 3: Cross multiply
    255,956.20x = 383,930.70 × 115,714.60
  4. Step 4: Simplify right side
    255,956.20x = 44,426,387,378.22
  5. Step 5: Solve for x
    x = 44,426,387,378.22/255,956.20
  6. Step 6: Final answer
    x = 173,570.27

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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.