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Finding the Fourth Proportional to 436.86, 602.64 and 289.25

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Solution

The fourth proportional to 436.86, 602.64 and 289.25 is: 399.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.86 : 602.64 = 289.25 : x
  2. Step 2: Convert to fraction form
    436.86/602.64 = 289.25/x
  3. Step 3: Cross multiply
    436.86x = 602.64 × 289.25
  4. Step 4: Simplify right side
    436.86x = 174,310.61
  5. Step 5: Solve for x
    x = 174,310.61/436.86
  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.