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Finding the Fourth Proportional to 964.74, 1,330.90 and 571.54

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Solution

The fourth proportional to 964.74, 1,330.90 and 571.54 is: 788.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.74 : 1,330.90 = 571.54 : x
  2. Step 2: Convert to fraction form
    964.74/1,330.90 = 571.54/x
  3. Step 3: Cross multiply
    964.74x = 1,330.90 × 571.54
  4. Step 4: Simplify right side
    964.74x = 760,662.59
  5. Step 5: Solve for x
    x = 760,662.59/964.74
  6. Step 6: Final answer
    x = 788.46

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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.