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Finding the Fourth Proportional to 869.55, 1,199.67 and 496.25

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Solution

The fourth proportional to 869.55, 1,199.67 and 496.25 is: 684.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    869.55 : 1,199.67 = 496.25 : x
  2. Step 2: Convert to fraction form
    869.55/1,199.67 = 496.25/x
  3. Step 3: Cross multiply
    869.55x = 1,199.67 × 496.25
  4. Step 4: Simplify right side
    869.55x = 595,342.42
  5. Step 5: Solve for x
    x = 595,342.42/869.55
  6. Step 6: Final answer
    x = 684.66

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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.