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Finding the Fourth Proportional to 279.35, 419.19 and 210.77

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Solution

The fourth proportional to 279.35, 419.19 and 210.77 is: 316.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.35 : 419.19 = 210.77 : x
  2. Step 2: Convert to fraction form
    279.35/419.19 = 210.77/x
  3. Step 3: Cross multiply
    279.35x = 419.19 × 210.77
  4. Step 4: Simplify right side
    279.35x = 88,349.53
  5. Step 5: Solve for x
    x = 88,349.53/279.35
  6. Step 6: Final answer
    x = 316.27

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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.