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Finding the Fourth Proportional to 281,988.99, 389,150.88 and 154,664.28

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Solution

The fourth proportional to 281,988.99, 389,150.88 and 154,664.28 is: 213,440.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,988.99 : 389,150.88 = 154,664.28 : x
  2. Step 2: Convert to fraction form
    281,988.99/389,150.88 = 154,664.28/x
  3. Step 3: Cross multiply
    281,988.99x = 389,150.88 × 154,664.28
  4. Step 4: Simplify right side
    281,988.99x = 60,187,740,666.57
  5. Step 5: Solve for x
    x = 60,187,740,666.57/281,988.99
  6. Step 6: Final answer
    x = 213,440.04

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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.