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Finding the Fourth Proportional to 964.17, 1,330.61 and 632.79

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Solution

The fourth proportional to 964.17, 1,330.61 and 632.79 is: 873.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.17 : 1,330.61 = 632.79 : x
  2. Step 2: Convert to fraction form
    964.17/1,330.61 = 632.79/x
  3. Step 3: Cross multiply
    964.17x = 1,330.61 × 632.79
  4. Step 4: Simplify right side
    964.17x = 841,993.54
  5. Step 5: Solve for x
    x = 841,993.54/964.17
  6. Step 6: Final answer
    x = 873.28

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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.