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Finding the Fourth Proportional to 610.99, 915.72 and 263.94

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Solution

The fourth proportional to 610.99, 915.72 and 263.94 is: 395.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.99 : 915.72 = 263.94 : x
  2. Step 2: Convert to fraction form
    610.99/915.72 = 263.94/x
  3. Step 3: Cross multiply
    610.99x = 915.72 × 263.94
  4. Step 4: Simplify right side
    610.99x = 241,695.14
  5. Step 5: Solve for x
    x = 241,695.14/610.99
  6. Step 6: Final answer
    x = 395.58

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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.