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Finding the Fourth Proportional to 1,141.77, 1,703.91 and 1,018.75

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Solution

The fourth proportional to 1,141.77, 1,703.91 and 1,018.75 is: 1,520.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.77 : 1,703.91 = 1,018.75 : x
  2. Step 2: Convert to fraction form
    1,141.77/1,703.91 = 1,018.75/x
  3. Step 3: Cross multiply
    1,141.77x = 1,703.91 × 1,018.75
  4. Step 4: Simplify right side
    1,141.77x = 1,735,858.31
  5. Step 5: Solve for x
    x = 1,735,858.31/1,141.77
  6. Step 6: Final answer
    x = 1,520.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.