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Finding the Fourth Proportional to 1,230, 1,694.04 and 1,143.90

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Solution

The fourth proportional to 1,230, 1,694.04 and 1,143.90 is: 1,575.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,230 : 1,694.04 = 1,143.90 : x
  2. Step 2: Convert to fraction form
    1,230/1,694.04 = 1,143.90/x
  3. Step 3: Cross multiply
    1,230x = 1,694.04 × 1,143.90
  4. Step 4: Simplify right side
    1,230x = 1,937,812.36
  5. Step 5: Solve for x
    x = 1,937,812.36/1,230
  6. Step 6: Final answer
    x = 1,575.46

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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.