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Finding the Fourth Proportional to 446.04, 670.28 and 389.61

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Solution

The fourth proportional to 446.04, 670.28 and 389.61 is: 585.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.04 : 670.28 = 389.61 : x
  2. Step 2: Convert to fraction form
    446.04/670.28 = 389.61/x
  3. Step 3: Cross multiply
    446.04x = 670.28 × 389.61
  4. Step 4: Simplify right side
    446.04x = 261,147.79
  5. Step 5: Solve for x
    x = 261,147.79/446.04
  6. Step 6: Final answer
    x = 585.48

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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.