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Finding the Fourth Proportional to 436.70, 653.70 and 344.90

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Solution

The fourth proportional to 436.70, 653.70 and 344.90 is: 516.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.70 : 653.70 = 344.90 : x
  2. Step 2: Convert to fraction form
    436.70/653.70 = 344.90/x
  3. Step 3: Cross multiply
    436.70x = 653.70 × 344.90
  4. Step 4: Simplify right side
    436.70x = 225,461.13
  5. Step 5: Solve for x
    x = 225,461.13/436.70
  6. Step 6: Final answer
    x = 516.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.