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Finding the Fourth Proportional to 500.71, 690.93 and 304.21

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Solution

The fourth proportional to 500.71, 690.93 and 304.21 is: 419.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.71 : 690.93 = 304.21 : x
  2. Step 2: Convert to fraction form
    500.71/690.93 = 304.21/x
  3. Step 3: Cross multiply
    500.71x = 690.93 × 304.21
  4. Step 4: Simplify right side
    500.71x = 210,187.82
  5. Step 5: Solve for x
    x = 210,187.82/500.71
  6. Step 6: Final answer
    x = 419.78

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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.