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Finding the Fourth Proportional to 323,421.20, 485,131.80 and 310,518.80

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Solution

The fourth proportional to 323,421.20, 485,131.80 and 310,518.80 is: 465,778.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,421.20 : 485,131.80 = 310,518.80 : x
  2. Step 2: Convert to fraction form
    323,421.20/485,131.80 = 310,518.80/x
  3. Step 3: Cross multiply
    323,421.20x = 485,131.80 × 310,518.80
  4. Step 4: Simplify right side
    323,421.20x = 150,642,544,377.84
  5. Step 5: Solve for x
    x = 150,642,544,377.84/323,421.20
  6. Step 6: Final answer
    x = 465,778.20

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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.