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Finding the Fourth Proportional to 343,391.20, 515,086.80 and 324,145.60

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Solution

The fourth proportional to 343,391.20, 515,086.80 and 324,145.60 is: 486,218.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,391.20 : 515,086.80 = 324,145.60 : x
  2. Step 2: Convert to fraction form
    343,391.20/515,086.80 = 324,145.60/x
  3. Step 3: Cross multiply
    343,391.20x = 515,086.80 × 324,145.60
  4. Step 4: Simplify right side
    343,391.20x = 166,963,119,838.08
  5. Step 5: Solve for x
    x = 166,963,119,838.08/343,391.20
  6. Step 6: Final answer
    x = 486,218.40

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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.