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Finding the Fourth Proportional to 386,201.25, 579,389.49 and 136,883.25

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Solution

The fourth proportional to 386,201.25, 579,389.49 and 136,883.25 is: 205,355.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,201.25 : 579,389.49 = 136,883.25 : x
  2. Step 2: Convert to fraction form
    386,201.25/579,389.49 = 136,883.25/x
  3. Step 3: Cross multiply
    386,201.25x = 579,389.49 × 136,883.25
  4. Step 4: Simplify right side
    386,201.25x = 79,308,716,407.04
  5. Step 5: Solve for x
    x = 79,308,716,407.04/386,201.25
  6. Step 6: Final answer
    x = 205,355.93

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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.