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Finding the Fourth Proportional to 853.08, 1,173.60 and 753

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Solution

The fourth proportional to 853.08, 1,173.60 and 753 is: 1,035.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.08 : 1,173.60 = 753 : x
  2. Step 2: Convert to fraction form
    853.08/1,173.60 = 753/x
  3. Step 3: Cross multiply
    853.08x = 1,173.60 × 753
  4. Step 4: Simplify right side
    853.08x = 883,720.80
  5. Step 5: Solve for x
    x = 883,720.80/853.08
  6. Step 6: Final answer
    x = 1,035.92

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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.