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Finding the Fourth Proportional to 441.02, 606.62 and 390.26

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Solution

The fourth proportional to 441.02, 606.62 and 390.26 is: 536.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    441.02 : 606.62 = 390.26 : x
  2. Step 2: Convert to fraction form
    441.02/606.62 = 390.26/x
  3. Step 3: Cross multiply
    441.02x = 606.62 × 390.26
  4. Step 4: Simplify right side
    441.02x = 236,742.01
  5. Step 5: Solve for x
    x = 236,742.01/441.02
  6. Step 6: Final answer
    x = 536.80

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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.