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Finding the Fourth Proportional to 964.26, 1,330.74 and 571.20

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Solution

The fourth proportional to 964.26, 1,330.74 and 571.20 is: 788.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.26 : 1,330.74 = 571.20 : x
  2. Step 2: Convert to fraction form
    964.26/1,330.74 = 571.20/x
  3. Step 3: Cross multiply
    964.26x = 1,330.74 × 571.20
  4. Step 4: Simplify right side
    964.26x = 760,118.69
  5. Step 5: Solve for x
    x = 760,118.69/964.26
  6. Step 6: Final answer
    x = 788.29

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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.