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Finding the Fourth Proportional to 279.84, 419.84 and 117.62

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Solution

The fourth proportional to 279.84, 419.84 and 117.62 is: 176.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.84 : 419.84 = 117.62 : x
  2. Step 2: Convert to fraction form
    279.84/419.84 = 117.62/x
  3. Step 3: Cross multiply
    279.84x = 419.84 × 117.62
  4. Step 4: Simplify right side
    279.84x = 49,381.58
  5. Step 5: Solve for x
    x = 49,381.58/279.84
  6. Step 6: Final answer
    x = 176.46

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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.