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Finding the Fourth Proportional to 964.27, 1,330.70 and 571.21

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Solution

The fourth proportional to 964.27, 1,330.70 and 571.21 is: 788.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.27 : 1,330.70 = 571.21 : x
  2. Step 2: Convert to fraction form
    964.27/1,330.70 = 571.21/x
  3. Step 3: Cross multiply
    964.27x = 1,330.70 × 571.21
  4. Step 4: Simplify right side
    964.27x = 760,109.15
  5. Step 5: Solve for x
    x = 760,109.15/964.27
  6. Step 6: Final answer
    x = 788.27

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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.