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Finding the Fourth Proportional to 281,387.34, 388,351.49 and 160,500.87

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Solution

The fourth proportional to 281,387.34, 388,351.49 and 160,500.87 is: 221,512.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,387.34 : 388,351.49 = 160,500.87 : x
  2. Step 2: Convert to fraction form
    281,387.34/388,351.49 = 160,500.87/x
  3. Step 3: Cross multiply
    281,387.34x = 388,351.49 × 160,500.87
  4. Step 4: Simplify right side
    281,387.34x = 62,330,751,208.29
  5. Step 5: Solve for x
    x = 62,330,751,208.29/281,387.34
  6. Step 6: Final answer
    x = 221,512.28

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1.5x scale

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.