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Finding the Fourth Proportional to 436.20, 653.13 and 299.51

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Solution

The fourth proportional to 436.20, 653.13 and 299.51 is: 448.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.20 : 653.13 = 299.51 : x
  2. Step 2: Convert to fraction form
    436.20/653.13 = 299.51/x
  3. Step 3: Cross multiply
    436.20x = 653.13 × 299.51
  4. Step 4: Simplify right side
    436.20x = 195,615.70
  5. Step 5: Solve for x
    x = 195,615.70/436.20
  6. Step 6: Final answer
    x = 448.45

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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.