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Finding the Fourth Proportional to 433.68, 651.36 and 389.04

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Solution

The fourth proportional to 433.68, 651.36 and 389.04 is: 584.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.68 : 651.36 = 389.04 : x
  2. Step 2: Convert to fraction form
    433.68/651.36 = 389.04/x
  3. Step 3: Cross multiply
    433.68x = 651.36 × 389.04
  4. Step 4: Simplify right side
    433.68x = 253,405.09
  5. Step 5: Solve for x
    x = 253,405.09/433.68
  6. Step 6: Final answer
    x = 584.31

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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.