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Finding the Fourth Proportional to 965.24, 1,330.79 and 788.02

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Solution

The fourth proportional to 965.24, 1,330.79 and 788.02 is: 1,086.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.24 : 1,330.79 = 788.02 : x
  2. Step 2: Convert to fraction form
    965.24/1,330.79 = 788.02/x
  3. Step 3: Cross multiply
    965.24x = 1,330.79 × 788.02
  4. Step 4: Simplify right side
    965.24x = 1,048,689.14
  5. Step 5: Solve for x
    x = 1,048,689.14/965.24
  6. Step 6: Final answer
    x = 1,086.45

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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.