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Finding the Fourth Proportional to 320,434.60, 479,995.80 and 162,751.90

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Solution

The fourth proportional to 320,434.60, 479,995.80 and 162,751.90 is: 243,794.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,434.60 : 479,995.80 = 162,751.90 : x
  2. Step 2: Convert to fraction form
    320,434.60/479,995.80 = 162,751.90/x
  3. Step 3: Cross multiply
    320,434.60x = 479,995.80 × 162,751.90
  4. Step 4: Simplify right side
    320,434.60x = 78,120,228,442.02
  5. Step 5: Solve for x
    x = 78,120,228,442.02/320,434.60
  6. Step 6: Final answer
    x = 243,794.61

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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.