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Finding the Fourth Proportional to 451.84, 623.43 and 255.35

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Solution

The fourth proportional to 451.84, 623.43 and 255.35 is: 352.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.84 : 623.43 = 255.35 : x
  2. Step 2: Convert to fraction form
    451.84/623.43 = 255.35/x
  3. Step 3: Cross multiply
    451.84x = 623.43 × 255.35
  4. Step 4: Simplify right side
    451.84x = 159,192.85
  5. Step 5: Solve for x
    x = 159,192.85/451.84
  6. Step 6: Final answer
    x = 352.32

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Double scale
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Similar ratio
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1.5x scale

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.