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Finding the Fourth Proportional to 620.34, 929.46 and 436.89

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Solution

The fourth proportional to 620.34, 929.46 and 436.89 is: 654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.34 : 929.46 = 436.89 : x
  2. Step 2: Convert to fraction form
    620.34/929.46 = 436.89/x
  3. Step 3: Cross multiply
    620.34x = 929.46 × 436.89
  4. Step 4: Simplify right side
    620.34x = 406,071.78
  5. Step 5: Solve for x
    x = 406,071.78/620.34
  6. Step 6: Final answer
    x = 654.60

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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.