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Finding the Fourth Proportional to 500.17, 690.35 and 303.64

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Solution

The fourth proportional to 500.17, 690.35 and 303.64 is: 419.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.17 : 690.35 = 303.64 : x
  2. Step 2: Convert to fraction form
    500.17/690.35 = 303.64/x
  3. Step 3: Cross multiply
    500.17x = 690.35 × 303.64
  4. Step 4: Simplify right side
    500.17x = 209,617.87
  5. Step 5: Solve for x
    x = 209,617.87/500.17
  6. Step 6: Final answer
    x = 419.09

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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.