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Finding the Fourth Proportional to 389.56, 537.30 and 242.05

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Solution

The fourth proportional to 389.56, 537.30 and 242.05 is: 333.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.56 : 537.30 = 242.05 : x
  2. Step 2: Convert to fraction form
    389.56/537.30 = 242.05/x
  3. Step 3: Cross multiply
    389.56x = 537.30 × 242.05
  4. Step 4: Simplify right side
    389.56x = 130,052.86
  5. Step 5: Solve for x
    x = 130,052.86/389.56
  6. Step 6: Final answer
    x = 333.85

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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.