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Finding the Fourth Proportional to 2,730.28, 4,095.42 and 678.28

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Solution

The fourth proportional to 2,730.28, 4,095.42 and 678.28 is: 1,017.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,730.28 : 4,095.42 = 678.28 : x
  2. Step 2: Convert to fraction form
    2,730.28/4,095.42 = 678.28/x
  3. Step 3: Cross multiply
    2,730.28x = 4,095.42 × 678.28
  4. Step 4: Simplify right side
    2,730.28x = 2,777,849.14
  5. Step 5: Solve for x
    x = 2,777,849.14/2,730.28
  6. Step 6: Final answer
    x = 1,017.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.