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Finding the Fourth Proportional to 380,695.73, 571,022.55 and 127,950.12

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Solution

The fourth proportional to 380,695.73, 571,022.55 and 127,950.12 is: 191,918.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,695.73 : 571,022.55 = 127,950.12 : x
  2. Step 2: Convert to fraction form
    380,695.73/571,022.55 = 127,950.12/x
  3. Step 3: Cross multiply
    380,695.73x = 571,022.55 × 127,950.12
  4. Step 4: Simplify right side
    380,695.73x = 73,062,403,795.21
  5. Step 5: Solve for x
    x = 73,062,403,795.21/380,695.73
  6. Step 6: Final answer
    x = 191,918.11

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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.