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Finding the Fourth Proportional to 659.08, 988.60 and 269.08

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Solution

The fourth proportional to 659.08, 988.60 and 269.08 is: 403.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659.08 : 988.60 = 269.08 : x
  2. Step 2: Convert to fraction form
    659.08/988.60 = 269.08/x
  3. Step 3: Cross multiply
    659.08x = 988.60 × 269.08
  4. Step 4: Simplify right side
    659.08x = 266,007.55
  5. Step 5: Solve for x
    x = 266,007.55/659.08
  6. Step 6: Final answer
    x = 403.60

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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.