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Finding the Fourth Proportional to 500.40, 690.60 and 461.18

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Solution

The fourth proportional to 500.40, 690.60 and 461.18 is: 636.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.40 : 690.60 = 461.18 : x
  2. Step 2: Convert to fraction form
    500.40/690.60 = 461.18/x
  3. Step 3: Cross multiply
    500.40x = 690.60 × 461.18
  4. Step 4: Simplify right side
    500.40x = 318,488.60
  5. Step 5: Solve for x
    x = 318,488.60/500.40
  6. Step 6: Final answer
    x = 636.47

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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.