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Finding the Fourth Proportional to 658.54, 988.42 and 312.08

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Solution

The fourth proportional to 658.54, 988.42 and 312.08 is: 468.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.54 : 988.42 = 312.08 : x
  2. Step 2: Convert to fraction form
    658.54/988.42 = 312.08/x
  3. Step 3: Cross multiply
    658.54x = 988.42 × 312.08
  4. Step 4: Simplify right side
    658.54x = 308,466.11
  5. Step 5: Solve for x
    x = 308,466.11/658.54
  6. Step 6: Final answer
    x = 468.41

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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.