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Finding the Fourth Proportional to 475.25, 712.14 and 320.60

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Solution

The fourth proportional to 475.25, 712.14 and 320.60 is: 480.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.25 : 712.14 = 320.60 : x
  2. Step 2: Convert to fraction form
    475.25/712.14 = 320.60/x
  3. Step 3: Cross multiply
    475.25x = 712.14 × 320.60
  4. Step 4: Simplify right side
    475.25x = 228,312.08
  5. Step 5: Solve for x
    x = 228,312.08/475.25
  6. Step 6: Final answer
    x = 480.40

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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.