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Finding the Fourth Proportional to 412.81, 569.04 and 279.77

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Solution

The fourth proportional to 412.81, 569.04 and 279.77 is: 385.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.81 : 569.04 = 279.77 : x
  2. Step 2: Convert to fraction form
    412.81/569.04 = 279.77/x
  3. Step 3: Cross multiply
    412.81x = 569.04 × 279.77
  4. Step 4: Simplify right side
    412.81x = 159,201.20
  5. Step 5: Solve for x
    x = 159,201.20/412.81
  6. Step 6: Final answer
    x = 385.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.