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Finding the Fourth Proportional to 440.22, 607.08 and 357.21

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Solution

The fourth proportional to 440.22, 607.08 and 357.21 is: 492.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.22 : 607.08 = 357.21 : x
  2. Step 2: Convert to fraction form
    440.22/607.08 = 357.21/x
  3. Step 3: Cross multiply
    440.22x = 607.08 × 357.21
  4. Step 4: Simplify right side
    440.22x = 216,855.05
  5. Step 5: Solve for x
    x = 216,855.05/440.22
  6. Step 6: Final answer
    x = 492.61

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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.