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Finding the Fourth Proportional to 433.64, 646.70 and 404.48

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Solution

The fourth proportional to 433.64, 646.70 and 404.48 is: 603.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.64 : 646.70 = 404.48 : x
  2. Step 2: Convert to fraction form
    433.64/646.70 = 404.48/x
  3. Step 3: Cross multiply
    433.64x = 646.70 × 404.48
  4. Step 4: Simplify right side
    433.64x = 261,577.22
  5. Step 5: Solve for x
    x = 261,577.22/433.64
  6. Step 6: Final answer
    x = 603.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.