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Finding the Fourth Proportional to 324,012.80, 486,019.20 and 257,090.60

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Solution

The fourth proportional to 324,012.80, 486,019.20 and 257,090.60 is: 385,635.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    324,012.80 : 486,019.20 = 257,090.60 : x
  2. Step 2: Convert to fraction form
    324,012.80/486,019.20 = 257,090.60/x
  3. Step 3: Cross multiply
    324,012.80x = 486,019.20 × 257,090.60
  4. Step 4: Simplify right side
    324,012.80x = 124,950,967,739.52
  5. Step 5: Solve for x
    x = 124,950,967,739.52/324,012.80
  6. Step 6: Final answer
    x = 385,635.90

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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.