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Finding the Fourth Proportional to 445.92, 670.08 and 389.48

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Solution

The fourth proportional to 445.92, 670.08 and 389.48 is: 585.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.92 : 670.08 = 389.48 : x
  2. Step 2: Convert to fraction form
    445.92/670.08 = 389.48/x
  3. Step 3: Cross multiply
    445.92x = 670.08 × 389.48
  4. Step 4: Simplify right side
    445.92x = 260,982.76
  5. Step 5: Solve for x
    x = 260,982.76/445.92
  6. Step 6: Final answer
    x = 585.27

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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.