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Finding the Fourth Proportional to 669.38, 923.74 and 436.50

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Solution

The fourth proportional to 669.38, 923.74 and 436.50 is: 602.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    669.38 : 923.74 = 436.50 : x
  2. Step 2: Convert to fraction form
    669.38/923.74 = 436.50/x
  3. Step 3: Cross multiply
    669.38x = 923.74 × 436.50
  4. Step 4: Simplify right side
    669.38x = 403,211.42
  5. Step 5: Solve for x
    x = 403,211.42/669.38
  6. Step 6: Final answer
    x = 602.37

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1.5x scale

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.