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Finding the Fourth Proportional to 1,150.44, 1,587.96 and 678.30

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Solution

The fourth proportional to 1,150.44, 1,587.96 and 678.30 is: 936.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,150.44 : 1,587.96 = 678.30 : x
  2. Step 2: Convert to fraction form
    1,150.44/1,587.96 = 678.30/x
  3. Step 3: Cross multiply
    1,150.44x = 1,587.96 × 678.30
  4. Step 4: Simplify right side
    1,150.44x = 1,077,107.02
  5. Step 5: Solve for x
    x = 1,077,107.02/1,150.44
  6. Step 6: Final answer
    x = 936.26

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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.