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Finding the Fourth Proportional to 832.80, 1,247.64 and 696.72

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Solution

The fourth proportional to 832.80, 1,247.64 and 696.72 is: 1,043.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.80 : 1,247.64 = 696.72 : x
  2. Step 2: Convert to fraction form
    832.80/1,247.64 = 696.72/x
  3. Step 3: Cross multiply
    832.80x = 1,247.64 × 696.72
  4. Step 4: Simplify right side
    832.80x = 869,255.74
  5. Step 5: Solve for x
    x = 869,255.74/832.80
  6. Step 6: Final answer
    x = 1,043.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.