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Finding the Fourth Proportional to 955.10, 1,317.38 and 674.84

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Solution

The fourth proportional to 955.10, 1,317.38 and 674.84 is: 930.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.10 : 1,317.38 = 674.84 : x
  2. Step 2: Convert to fraction form
    955.10/1,317.38 = 674.84/x
  3. Step 3: Cross multiply
    955.10x = 1,317.38 × 674.84
  4. Step 4: Simplify right side
    955.10x = 889,020.72
  5. Step 5: Solve for x
    x = 889,020.72/955.10
  6. Step 6: Final answer
    x = 930.81

Related Problems

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Half scale
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Double scale
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1.5x scale

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.