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Finding the Fourth Proportional to 323,860.60, 485,790.90 and 102,215.80

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Solution

The fourth proportional to 323,860.60, 485,790.90 and 102,215.80 is: 153,323.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,860.60 : 485,790.90 = 102,215.80 : x
  2. Step 2: Convert to fraction form
    323,860.60/485,790.90 = 102,215.80/x
  3. Step 3: Cross multiply
    323,860.60x = 485,790.90 × 102,215.80
  4. Step 4: Simplify right side
    323,860.60x = 49,655,505,476.22
  5. Step 5: Solve for x
    x = 49,655,505,476.22/323,860.60
  6. Step 6: Final answer
    x = 153,323.70

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1.5x scale

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.