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Finding the Fourth Proportional to 492.36, 737.63 and 431.31

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Solution

The fourth proportional to 492.36, 737.63 and 431.31 is: 646.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.36 : 737.63 = 431.31 : x
  2. Step 2: Convert to fraction form
    492.36/737.63 = 431.31/x
  3. Step 3: Cross multiply
    492.36x = 737.63 × 431.31
  4. Step 4: Simplify right side
    492.36x = 318,145.04
  5. Step 5: Solve for x
    x = 318,145.04/492.36
  6. Step 6: Final answer
    x = 646.16

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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.