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Finding the Fourth Proportional to 395,015.66, 545,117.72 and 213,723.60

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Solution

The fourth proportional to 395,015.66, 545,117.72 and 213,723.60 is: 294,936.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,015.66 : 545,117.72 = 213,723.60 : x
  2. Step 2: Convert to fraction form
    395,015.66/545,117.72 = 213,723.60/x
  3. Step 3: Cross multiply
    395,015.66x = 545,117.72 × 213,723.60
  4. Step 4: Simplify right side
    395,015.66x = 116,504,520,473.57
  5. Step 5: Solve for x
    x = 116,504,520,473.57/395,015.66
  6. Step 6: Final answer
    x = 294,936.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.