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Finding the Fourth Proportional to 500.64, 690.92 and 290.88

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Solution

The fourth proportional to 500.64, 690.92 and 290.88 is: 401.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.64 : 690.92 = 290.88 : x
  2. Step 2: Convert to fraction form
    500.64/690.92 = 290.88/x
  3. Step 3: Cross multiply
    500.64x = 690.92 × 290.88
  4. Step 4: Simplify right side
    500.64x = 200,977.21
  5. Step 5: Solve for x
    x = 200,977.21/500.64
  6. Step 6: Final answer
    x = 401.44

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1.5x scale

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.