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Finding the Fourth Proportional to 281,570, 388,566.60 and 154,246.10

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Solution

The fourth proportional to 281,570, 388,566.60 and 154,246.10 is: 212,859.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,570 : 388,566.60 = 154,246.10 : x
  2. Step 2: Convert to fraction form
    281,570/388,566.60 = 154,246.10/x
  3. Step 3: Cross multiply
    281,570x = 388,566.60 × 154,246.10
  4. Step 4: Simplify right side
    281,570x = 59,934,882,640.26
  5. Step 5: Solve for x
    x = 59,934,882,640.26/281,570
  6. Step 6: Final answer
    x = 212,859.62

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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.