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Finding the Fourth Proportional to 1,018.24, 1,402.80 and 843.04

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Solution

The fourth proportional to 1,018.24, 1,402.80 and 843.04 is: 1,161.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.24 : 1,402.80 = 843.04 : x
  2. Step 2: Convert to fraction form
    1,018.24/1,402.80 = 843.04/x
  3. Step 3: Cross multiply
    1,018.24x = 1,402.80 × 843.04
  4. Step 4: Simplify right side
    1,018.24x = 1,182,616.51
  5. Step 5: Solve for x
    x = 1,182,616.51/1,018.24
  6. Step 6: Final answer
    x = 1,161.43

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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.