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Finding the Fourth Proportional to 664.81, 915.57 and 650.46

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Solution

The fourth proportional to 664.81, 915.57 and 650.46 is: 895.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    664.81 : 915.57 = 650.46 : x
  2. Step 2: Convert to fraction form
    664.81/915.57 = 650.46/x
  3. Step 3: Cross multiply
    664.81x = 915.57 × 650.46
  4. Step 4: Simplify right side
    664.81x = 595,541.66
  5. Step 5: Solve for x
    x = 595,541.66/664.81
  6. Step 6: Final answer
    x = 895.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.