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Finding the Fourth Proportional to 444.10, 666.15 and 418.90

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Solution

The fourth proportional to 444.10, 666.15 and 418.90 is: 628.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.10 : 666.15 = 418.90 : x
  2. Step 2: Convert to fraction form
    444.10/666.15 = 418.90/x
  3. Step 3: Cross multiply
    444.10x = 666.15 × 418.90
  4. Step 4: Simplify right side
    444.10x = 279,050.24
  5. Step 5: Solve for x
    x = 279,050.24/444.10
  6. Step 6: Final answer
    x = 628.35

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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.