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Finding the Fourth Proportional to 926.55, 1,279.25 and 716.36

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Solution

The fourth proportional to 926.55, 1,279.25 and 716.36 is: 989.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.55 : 1,279.25 = 716.36 : x
  2. Step 2: Convert to fraction form
    926.55/1,279.25 = 716.36/x
  3. Step 3: Cross multiply
    926.55x = 1,279.25 × 716.36
  4. Step 4: Simplify right side
    926.55x = 916,393.55
  5. Step 5: Solve for x
    x = 916,393.55/926.55
  6. Step 6: Final answer
    x = 989.04

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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.