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Finding the Fourth Proportional to 1,392.82, 2,087.42 and 570.14

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Solution

The fourth proportional to 1,392.82, 2,087.42 and 570.14 is: 854.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392.82 : 2,087.42 = 570.14 : x
  2. Step 2: Convert to fraction form
    1,392.82/2,087.42 = 570.14/x
  3. Step 3: Cross multiply
    1,392.82x = 2,087.42 × 570.14
  4. Step 4: Simplify right side
    1,392.82x = 1,190,121.64
  5. Step 5: Solve for x
    x = 1,190,121.64/1,392.82
  6. Step 6: Final answer
    x = 854.47

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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.