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Finding the Fourth Proportional to 952.85, 1,313.37 and 638.01

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Solution

The fourth proportional to 952.85, 1,313.37 and 638.01 is: 879.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    952.85 : 1,313.37 = 638.01 : x
  2. Step 2: Convert to fraction form
    952.85/1,313.37 = 638.01/x
  3. Step 3: Cross multiply
    952.85x = 1,313.37 × 638.01
  4. Step 4: Simplify right side
    952.85x = 837,933.44
  5. Step 5: Solve for x
    x = 837,933.44/952.85
  6. Step 6: Final answer
    x = 879.40

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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.