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Finding the Fourth Proportional to 528.50, 792.23 and 254.43

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Solution

The fourth proportional to 528.50, 792.23 and 254.43 is: 381.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.50 : 792.23 = 254.43 : x
  2. Step 2: Convert to fraction form
    528.50/792.23 = 254.43/x
  3. Step 3: Cross multiply
    528.50x = 792.23 × 254.43
  4. Step 4: Simplify right side
    528.50x = 201,565.81
  5. Step 5: Solve for x
    x = 201,565.81/528.50
  6. Step 6: Final answer
    x = 381.40

Related Problems

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Half scale
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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.