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Finding the Fourth Proportional to 500.30, 690.36 and 290.54

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Solution

The fourth proportional to 500.30, 690.36 and 290.54 is: 400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.30 : 690.36 = 290.54 : x
  2. Step 2: Convert to fraction form
    500.30/690.36 = 290.54/x
  3. Step 3: Cross multiply
    500.30x = 690.36 × 290.54
  4. Step 4: Simplify right side
    500.30x = 200,577.19
  5. Step 5: Solve for x
    x = 200,577.19/500.30
  6. Step 6: Final answer
    x = 400.91

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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.