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Finding the Fourth Proportional to 380,628.60, 570,942.90 and 191,015.70

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Solution

The fourth proportional to 380,628.60, 570,942.90 and 191,015.70 is: 286,523.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,628.60 : 570,942.90 = 191,015.70 : x
  2. Step 2: Convert to fraction form
    380,628.60/570,942.90 = 191,015.70/x
  3. Step 3: Cross multiply
    380,628.60x = 570,942.90 × 191,015.70
  4. Step 4: Simplify right side
    380,628.60x = 109,059,057,703.53
  5. Step 5: Solve for x
    x = 109,059,057,703.53/380,628.60
  6. Step 6: Final answer
    x = 286,523.55

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Similar ratio
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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.