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Finding the Fourth Proportional to 525.50, 788.54 and 320.21

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Solution

The fourth proportional to 525.50, 788.54 and 320.21 is: 480.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.50 : 788.54 = 320.21 : x
  2. Step 2: Convert to fraction form
    525.50/788.54 = 320.21/x
  3. Step 3: Cross multiply
    525.50x = 788.54 × 320.21
  4. Step 4: Simplify right side
    525.50x = 252,492.85
  5. Step 5: Solve for x
    x = 252,492.85/525.50
  6. Step 6: Final answer
    x = 480.49

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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.