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Finding the Fourth Proportional to 451.48, 623.16 and 346.54

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Solution

The fourth proportional to 451.48, 623.16 and 346.54 is: 478.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.48 : 623.16 = 346.54 : x
  2. Step 2: Convert to fraction form
    451.48/623.16 = 346.54/x
  3. Step 3: Cross multiply
    451.48x = 623.16 × 346.54
  4. Step 4: Simplify right side
    451.48x = 215,949.87
  5. Step 5: Solve for x
    x = 215,949.87/451.48
  6. Step 6: Final answer
    x = 478.32

Related Problems

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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.