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Finding the Fourth Proportional to 269,090, 371,344.30 and 155,978.36

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Solution

The fourth proportional to 269,090, 371,344.30 and 155,978.36 is: 215,250.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,090 : 371,344.30 = 155,978.36 : x
  2. Step 2: Convert to fraction form
    269,090/371,344.30 = 155,978.36/x
  3. Step 3: Cross multiply
    269,090x = 371,344.30 × 155,978.36
  4. Step 4: Simplify right side
    269,090x = 57,921,674,909.35
  5. Step 5: Solve for x
    x = 57,921,674,909.35/269,090
  6. Step 6: Final answer
    x = 215,250.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.