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Finding the Fourth Proportional to 436.30, 602.30 and 289.17

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Solution

The fourth proportional to 436.30, 602.30 and 289.17 is: 399.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.30 : 602.30 = 289.17 : x
  2. Step 2: Convert to fraction form
    436.30/602.30 = 289.17/x
  3. Step 3: Cross multiply
    436.30x = 602.30 × 289.17
  4. Step 4: Simplify right side
    436.30x = 174,167.81
  5. Step 5: Solve for x
    x = 174,167.81/436.30
  6. Step 6: Final answer
    x = 399.20

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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.