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Finding the Fourth Proportional to 955.64, 1,316.94 and 679.16

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Solution

The fourth proportional to 955.64, 1,316.94 and 679.16 is: 935.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    955.64 : 1,316.94 = 679.16 : x
  2. Step 2: Convert to fraction form
    955.64/1,316.94 = 679.16/x
  3. Step 3: Cross multiply
    955.64x = 1,316.94 × 679.16
  4. Step 4: Simplify right side
    955.64x = 894,412.97
  5. Step 5: Solve for x
    x = 894,412.97/955.64
  6. Step 6: Final answer
    x = 935.93

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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.