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Finding the Fourth Proportional to 500.68, 690.93 and 279.58

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Solution

The fourth proportional to 500.68, 690.93 and 279.58 is: 385.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.68 : 690.93 = 279.58 : x
  2. Step 2: Convert to fraction form
    500.68/690.93 = 279.58/x
  3. Step 3: Cross multiply
    500.68x = 690.93 × 279.58
  4. Step 4: Simplify right side
    500.68x = 193,170.21
  5. Step 5: Solve for x
    x = 193,170.21/500.68
  6. Step 6: Final answer
    x = 385.82

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.