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Finding the Fourth Proportional to 410.20, 615 and 193.64

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Solution

The fourth proportional to 410.20, 615 and 193.64 is: 290.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.20 : 615 = 193.64 : x
  2. Step 2: Convert to fraction form
    410.20/615 = 193.64/x
  3. Step 3: Cross multiply
    410.20x = 615 × 193.64
  4. Step 4: Simplify right side
    410.20x = 119,088.60
  5. Step 5: Solve for x
    x = 119,088.60/410.20
  6. Step 6: Final answer
    x = 290.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.