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Finding the Fourth Proportional to 610.34, 915.50 and 321.98

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Solution

The fourth proportional to 610.34, 915.50 and 321.98 is: 482.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.34 : 915.50 = 321.98 : x
  2. Step 2: Convert to fraction form
    610.34/915.50 = 321.98/x
  3. Step 3: Cross multiply
    610.34x = 915.50 × 321.98
  4. Step 4: Simplify right side
    610.34x = 294,768.92
  5. Step 5: Solve for x
    x = 294,768.92/610.34
  6. Step 6: Final answer
    x = 482.96

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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.