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Finding the Fourth Proportional to 436.79, 602.61 and 289.58

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Solution

The fourth proportional to 436.79, 602.61 and 289.58 is: 399.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.79 : 602.61 = 289.58 : x
  2. Step 2: Convert to fraction form
    436.79/602.61 = 289.58/x
  3. Step 3: Cross multiply
    436.79x = 602.61 × 289.58
  4. Step 4: Simplify right side
    436.79x = 174,500.79
  5. Step 5: Solve for x
    x = 174,500.79/436.79
  6. Step 6: Final answer
    x = 399.51

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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.