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Finding the Fourth Proportional to 445.04, 612.75 and 378.50

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Solution

The fourth proportional to 445.04, 612.75 and 378.50 is: 521.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.04 : 612.75 = 378.50 : x
  2. Step 2: Convert to fraction form
    445.04/612.75 = 378.50/x
  3. Step 3: Cross multiply
    445.04x = 612.75 × 378.50
  4. Step 4: Simplify right side
    445.04x = 231,922.81
  5. Step 5: Solve for x
    x = 231,922.81/445.04
  6. Step 6: Final answer
    x = 521.13

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Double scale
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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.