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Finding the Fourth Proportional to 281,491.66, 388,450.89 and 160,630.78

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Solution

The fourth proportional to 281,491.66, 388,450.89 and 160,630.78 is: 221,666.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,491.66 : 388,450.89 = 160,630.78 : x
  2. Step 2: Convert to fraction form
    281,491.66/388,450.89 = 160,630.78/x
  3. Step 3: Cross multiply
    281,491.66x = 388,450.89 × 160,630.78
  4. Step 4: Simplify right side
    281,491.66x = 62,397,169,452.39
  5. Step 5: Solve for x
    x = 62,397,169,452.39/281,491.66
  6. Step 6: Final answer
    x = 221,666.14

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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.