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Finding the Fourth Proportional to 965.08, 1,330.86 and 633.40

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Solution

The fourth proportional to 965.08, 1,330.86 and 633.40 is: 873.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.08 : 1,330.86 = 633.40 : x
  2. Step 2: Convert to fraction form
    965.08/1,330.86 = 633.40/x
  3. Step 3: Cross multiply
    965.08x = 1,330.86 × 633.40
  4. Step 4: Simplify right side
    965.08x = 842,966.72
  5. Step 5: Solve for x
    x = 842,966.72/965.08
  6. Step 6: Final answer
    x = 873.47

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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.