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Finding the Fourth Proportional to 941.60, 1,296.72 and 679.20

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Solution

The fourth proportional to 941.60, 1,296.72 and 679.20 is: 935.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.60 : 1,296.72 = 679.20 : x
  2. Step 2: Convert to fraction form
    941.60/1,296.72 = 679.20/x
  3. Step 3: Cross multiply
    941.60x = 1,296.72 × 679.20
  4. Step 4: Simplify right side
    941.60x = 880,732.22
  5. Step 5: Solve for x
    x = 880,732.22/941.60
  6. Step 6: Final answer
    x = 935.36

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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.