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Finding the Fourth Proportional to 658.51, 988.46 and 485.37

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Solution

The fourth proportional to 658.51, 988.46 and 485.37 is: 728.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.51 : 988.46 = 485.37 : x
  2. Step 2: Convert to fraction form
    658.51/988.46 = 485.37/x
  3. Step 3: Cross multiply
    658.51x = 988.46 × 485.37
  4. Step 4: Simplify right side
    658.51x = 479,770.11
  5. Step 5: Solve for x
    x = 479,770.11/658.51
  6. Step 6: Final answer
    x = 728.57

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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.