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Finding the Fourth Proportional to 380,322.70, 570,571.54 and 127,636.72

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Solution

The fourth proportional to 380,322.70, 570,571.54 and 127,636.72 is: 191,484.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,322.70 : 570,571.54 = 127,636.72 : x
  2. Step 2: Convert to fraction form
    380,322.70/570,571.54 = 127,636.72/x
  3. Step 3: Cross multiply
    380,322.70x = 570,571.54 × 127,636.72
  4. Step 4: Simplify right side
    380,322.70x = 72,825,878,145.43
  5. Step 5: Solve for x
    x = 72,825,878,145.43/380,322.70
  6. Step 6: Final answer
    x = 191,484.44

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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.