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Finding the Fourth Proportional to 380,647.75, 570,971.63 and 127,928.25

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Solution

The fourth proportional to 380,647.75, 570,971.63 and 127,928.25 is: 191,892.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,647.75 : 570,971.63 = 127,928.25 : x
  2. Step 2: Convert to fraction form
    380,647.75/570,971.63 = 127,928.25/x
  3. Step 3: Cross multiply
    380,647.75x = 570,971.63 × 127,928.25
  4. Step 4: Simplify right side
    380,647.75x = 73,043,401,425.55
  5. Step 5: Solve for x
    x = 73,043,401,425.55/380,647.75
  6. Step 6: Final answer
    x = 191,892.38

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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.