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Finding the Fourth Proportional to 444.10, 666.35 and 212.90

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Solution

The fourth proportional to 444.10, 666.35 and 212.90 is: 319.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.10 : 666.35 = 212.90 : x
  2. Step 2: Convert to fraction form
    444.10/666.35 = 212.90/x
  3. Step 3: Cross multiply
    444.10x = 666.35 × 212.90
  4. Step 4: Simplify right side
    444.10x = 141,865.92
  5. Step 5: Solve for x
    x = 141,865.92/444.10
  6. Step 6: Final answer
    x = 319.45

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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.