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Finding the Fourth Proportional to 410.19, 615.29 and 121.63

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Solution

The fourth proportional to 410.19, 615.29 and 121.63 is: 182.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.19 : 615.29 = 121.63 : x
  2. Step 2: Convert to fraction form
    410.19/615.29 = 121.63/x
  3. Step 3: Cross multiply
    410.19x = 615.29 × 121.63
  4. Step 4: Simplify right side
    410.19x = 74,834.04
  5. Step 5: Solve for x
    x = 74,834.04/410.19
  6. Step 6: Final answer
    x = 182.44

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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.