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Finding the Fourth Proportional to 964.12, 1,330.50 and 649.48

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Solution

The fourth proportional to 964.12, 1,330.50 and 649.48 is: 896.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.12 : 1,330.50 = 649.48 : x
  2. Step 2: Convert to fraction form
    964.12/1,330.50 = 649.48/x
  3. Step 3: Cross multiply
    964.12x = 1,330.50 × 649.48
  4. Step 4: Simplify right side
    964.12x = 864,133.14
  5. Step 5: Solve for x
    x = 864,133.14/964.12
  6. Step 6: Final answer
    x = 896.29

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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.