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Finding the Fourth Proportional to 281,668.55, 388,689.91 and 154,341.41

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Solution

The fourth proportional to 281,668.55, 388,689.91 and 154,341.41 is: 212,984.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,668.55 : 388,689.91 = 154,341.41 : x
  2. Step 2: Convert to fraction form
    281,668.55/388,689.91 = 154,341.41/x
  3. Step 3: Cross multiply
    281,668.55x = 388,689.91 × 154,341.41
  4. Step 4: Simplify right side
    281,668.55x = 59,990,946,432.87
  5. Step 5: Solve for x
    x = 59,990,946,432.87/281,668.55
  6. Step 6: Final answer
    x = 212,984.19

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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.