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Finding the Fourth Proportional to 1,018.24, 1,403.49 and 808.03

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Solution

The fourth proportional to 1,018.24, 1,403.49 and 808.03 is: 1,113.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.24 : 1,403.49 = 808.03 : x
  2. Step 2: Convert to fraction form
    1,018.24/1,403.49 = 808.03/x
  3. Step 3: Cross multiply
    1,018.24x = 1,403.49 × 808.03
  4. Step 4: Simplify right side
    1,018.24x = 1,134,062.02
  5. Step 5: Solve for x
    x = 1,134,062.02/1,018.24
  6. Step 6: Final answer
    x = 1,113.75

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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.