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Finding the Fourth Proportional to 280.13, 419.18 and 164.63

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Solution

The fourth proportional to 280.13, 419.18 and 164.63 is: 246.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.13 : 419.18 = 164.63 : x
  2. Step 2: Convert to fraction form
    280.13/419.18 = 164.63/x
  3. Step 3: Cross multiply
    280.13x = 419.18 × 164.63
  4. Step 4: Simplify right side
    280.13x = 69,009.83
  5. Step 5: Solve for x
    x = 69,009.83/280.13
  6. Step 6: Final answer
    x = 246.35

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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.