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Finding the Fourth Proportional to 436.98, 602.16 and 289.56

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Solution

The fourth proportional to 436.98, 602.16 and 289.56 is: 399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.98 : 602.16 = 289.56 : x
  2. Step 2: Convert to fraction form
    436.98/602.16 = 289.56/x
  3. Step 3: Cross multiply
    436.98x = 602.16 × 289.56
  4. Step 4: Simplify right side
    436.98x = 174,361.45
  5. Step 5: Solve for x
    x = 174,361.45/436.98
  6. Step 6: Final answer
    x = 399.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.