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Finding the Fourth Proportional to 1,117.28, 1,676.04 and 540.32

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Solution

The fourth proportional to 1,117.28, 1,676.04 and 540.32 is: 810.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,117.28 : 1,676.04 = 540.32 : x
  2. Step 2: Convert to fraction form
    1,117.28/1,676.04 = 540.32/x
  3. Step 3: Cross multiply
    1,117.28x = 1,676.04 × 540.32
  4. Step 4: Simplify right side
    1,117.28x = 905,597.93
  5. Step 5: Solve for x
    x = 905,597.93/1,117.28
  6. Step 6: Final answer
    x = 810.54

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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.