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Finding the Fourth Proportional to 832.08, 1,247.16 and 687.44

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Solution

The fourth proportional to 832.08, 1,247.16 and 687.44 is: 1,030.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.08 : 1,247.16 = 687.44 : x
  2. Step 2: Convert to fraction form
    832.08/1,247.16 = 687.44/x
  3. Step 3: Cross multiply
    832.08x = 1,247.16 × 687.44
  4. Step 4: Simplify right side
    832.08x = 857,347.67
  5. Step 5: Solve for x
    x = 857,347.67/832.08
  6. Step 6: Final answer
    x = 1,030.37

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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.