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Finding the Fourth Proportional to 500.46, 690.79 and 343.02

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Solution

The fourth proportional to 500.46, 690.79 and 343.02 is: 473.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.46 : 690.79 = 343.02 : x
  2. Step 2: Convert to fraction form
    500.46/690.79 = 343.02/x
  3. Step 3: Cross multiply
    500.46x = 690.79 × 343.02
  4. Step 4: Simplify right side
    500.46x = 236,954.79
  5. Step 5: Solve for x
    x = 236,954.79/500.46
  6. Step 6: Final answer
    x = 473.47

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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.