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Finding the Fourth Proportional to 279,504.81, 385,708.20 and 155,325.36

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Solution

The fourth proportional to 279,504.81, 385,708.20 and 155,325.36 is: 214,344.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,504.81 : 385,708.20 = 155,325.36 : x
  2. Step 2: Convert to fraction form
    279,504.81/385,708.20 = 155,325.36/x
  3. Step 3: Cross multiply
    279,504.81x = 385,708.20 × 155,325.36
  4. Step 4: Simplify right side
    279,504.81x = 59,910,265,019.95
  5. Step 5: Solve for x
    x = 59,910,265,019.95/279,504.81
  6. Step 6: Final answer
    x = 214,344.31

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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.