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Finding the Fourth Proportional to 289.58, 432.66 and 276.14

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Solution

The fourth proportional to 289.58, 432.66 and 276.14 is: 412.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.58 : 432.66 = 276.14 : x
  2. Step 2: Convert to fraction form
    289.58/432.66 = 276.14/x
  3. Step 3: Cross multiply
    289.58x = 432.66 × 276.14
  4. Step 4: Simplify right side
    289.58x = 119,473.35
  5. Step 5: Solve for x
    x = 119,473.35/289.58
  6. Step 6: Final answer
    x = 412.57

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.