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Finding the Fourth Proportional to 321,842.60, 482,879.10 and 134,911.40

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Solution

The fourth proportional to 321,842.60, 482,879.10 and 134,911.40 is: 202,415.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,842.60 : 482,879.10 = 134,911.40 : x
  2. Step 2: Convert to fraction form
    321,842.60/482,879.10 = 134,911.40/x
  3. Step 3: Cross multiply
    321,842.60x = 482,879.10 × 134,911.40
  4. Step 4: Simplify right side
    321,842.60x = 65,145,895,411.74
  5. Step 5: Solve for x
    x = 65,145,895,411.74/321,842.60
  6. Step 6: Final answer
    x = 202,415.39

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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.