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Finding the Fourth Proportional to 380,707.50, 571,070.43 and 127,991.28

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Solution

The fourth proportional to 380,707.50, 571,070.43 and 127,991.28 is: 191,990.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,707.50 : 571,070.43 = 127,991.28 : x
  2. Step 2: Convert to fraction form
    380,707.50/571,070.43 = 127,991.28/x
  3. Step 3: Cross multiply
    380,707.50x = 571,070.43 × 127,991.28
  4. Step 4: Simplify right side
    380,707.50x = 73,092,035,305.85
  5. Step 5: Solve for x
    x = 73,092,035,305.85/380,707.50
  6. Step 6: Final answer
    x = 191,990.01

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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.