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Finding the Fourth Proportional to 380,707.88, 571,070.99 and 127,991.66

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Solution

The fourth proportional to 380,707.88, 571,070.99 and 127,991.66 is: 191,990.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,707.88 : 571,070.99 = 127,991.66 : x
  2. Step 2: Convert to fraction form
    380,707.88/571,070.99 = 127,991.66/x
  3. Step 3: Cross multiply
    380,707.88x = 571,070.99 × 127,991.66
  4. Step 4: Simplify right side
    380,707.88x = 73,092,321,452.57
  5. Step 5: Solve for x
    x = 73,092,321,452.57/380,707.88
  6. Step 6: Final answer
    x = 191,990.57

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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.