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Finding the Fourth Proportional to 832.72, 1,247.98 and 345.64

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Solution

The fourth proportional to 832.72, 1,247.98 and 345.64 is: 518.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    832.72 : 1,247.98 = 345.64 : x
  2. Step 2: Convert to fraction form
    832.72/1,247.98 = 345.64/x
  3. Step 3: Cross multiply
    832.72x = 1,247.98 × 345.64
  4. Step 4: Simplify right side
    832.72x = 431,351.81
  5. Step 5: Solve for x
    x = 431,351.81/832.72
  6. Step 6: Final answer
    x = 518.00

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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.