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Finding the Fourth Proportional to 500.28, 690.56 and 352.99

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Solution

The fourth proportional to 500.28, 690.56 and 352.99 is: 487.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.28 : 690.56 = 352.99 : x
  2. Step 2: Convert to fraction form
    500.28/690.56 = 352.99/x
  3. Step 3: Cross multiply
    500.28x = 690.56 × 352.99
  4. Step 4: Simplify right side
    500.28x = 243,760.77
  5. Step 5: Solve for x
    x = 243,760.77/500.28
  6. Step 6: Final answer
    x = 487.25

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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.