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Finding the Fourth Proportional to 500.60, 690.81 and 304.07

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Solution

The fourth proportional to 500.60, 690.81 and 304.07 is: 419.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.60 : 690.81 = 304.07 : x
  2. Step 2: Convert to fraction form
    500.60/690.81 = 304.07/x
  3. Step 3: Cross multiply
    500.60x = 690.81 × 304.07
  4. Step 4: Simplify right side
    500.60x = 210,054.60
  5. Step 5: Solve for x
    x = 210,054.60/500.60
  6. Step 6: Final answer
    x = 419.61

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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.