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Finding the Fourth Proportional to 343,365.55, 515,540.40 and 259,712.80

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Solution

The fourth proportional to 343,365.55, 515,540.40 and 259,712.80 is: 389,941.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,365.55 : 515,540.40 = 259,712.80 : x
  2. Step 2: Convert to fraction form
    343,365.55/515,540.40 = 259,712.80/x
  3. Step 3: Cross multiply
    343,365.55x = 515,540.40 × 259,712.80
  4. Step 4: Simplify right side
    343,365.55x = 133,892,440,797.12
  5. Step 5: Solve for x
    x = 133,892,440,797.12/343,365.55
  6. Step 6: Final answer
    x = 389,941.39

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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.