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Finding the Fourth Proportional to 289.54, 434.79 and 277.06

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Solution

The fourth proportional to 289.54, 434.79 and 277.06 is: 416.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.54 : 434.79 = 277.06 : x
  2. Step 2: Convert to fraction form
    289.54/434.79 = 277.06/x
  3. Step 3: Cross multiply
    289.54x = 434.79 × 277.06
  4. Step 4: Simplify right side
    289.54x = 120,462.92
  5. Step 5: Solve for x
    x = 120,462.92/289.54
  6. Step 6: Final answer
    x = 416.05

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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.