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Finding the Fourth Proportional to 621.48, 929.82 and 436.52

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Solution

The fourth proportional to 621.48, 929.82 and 436.52 is: 653.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.48 : 929.82 = 436.52 : x
  2. Step 2: Convert to fraction form
    621.48/929.82 = 436.52/x
  3. Step 3: Cross multiply
    621.48x = 929.82 × 436.52
  4. Step 4: Simplify right side
    621.48x = 405,885.03
  5. Step 5: Solve for x
    x = 405,885.03/621.48
  6. Step 6: Final answer
    x = 653.09

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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.