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Finding the Fourth Proportional to 956.75, 1,321.15 and 603.30

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Solution

The fourth proportional to 956.75, 1,321.15 and 603.30 is: 833.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.75 : 1,321.15 = 603.30 : x
  2. Step 2: Convert to fraction form
    956.75/1,321.15 = 603.30/x
  3. Step 3: Cross multiply
    956.75x = 1,321.15 × 603.30
  4. Step 4: Simplify right side
    956.75x = 797,048.29
  5. Step 5: Solve for x
    x = 797,048.29/956.75
  6. Step 6: Final answer
    x = 833.08

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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.