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Finding the Fourth Proportional to 832.32, 1,247.76 and 345

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Solution

The fourth proportional to 832.32, 1,247.76 and 345 is: 517.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.32 : 1,247.76 = 345 : x
  2. Step 2: Convert to fraction form
    832.32/1,247.76 = 345/x
  3. Step 3: Cross multiply
    832.32x = 1,247.76 × 345
  4. Step 4: Simplify right side
    832.32x = 430,477.20
  5. Step 5: Solve for x
    x = 430,477.20/832.32
  6. Step 6: Final answer
    x = 517.20

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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.