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Finding the Fourth Proportional to 407.20, 609.27 and 242.06

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Solution

The fourth proportional to 407.20, 609.27 and 242.06 is: 362.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.20 : 609.27 = 242.06 : x
  2. Step 2: Convert to fraction form
    407.20/609.27 = 242.06/x
  3. Step 3: Cross multiply
    407.20x = 609.27 × 242.06
  4. Step 4: Simplify right side
    407.20x = 147,482.44
  5. Step 5: Solve for x
    x = 147,482.44/407.20
  6. Step 6: Final answer
    x = 362.18

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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.