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Finding the Fourth Proportional to 475.16, 712.35 and 279.68

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Solution

The fourth proportional to 475.16, 712.35 and 279.68 is: 419.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    475.16 : 712.35 = 279.68 : x
  2. Step 2: Convert to fraction form
    475.16/712.35 = 279.68/x
  3. Step 3: Cross multiply
    475.16x = 712.35 × 279.68
  4. Step 4: Simplify right side
    475.16x = 199,226.49
  5. Step 5: Solve for x
    x = 199,226.49/475.16
  6. Step 6: Final answer
    x = 419.29

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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.