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Finding the Fourth Proportional to 455.66, 683.24 and 212.01

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Solution

The fourth proportional to 455.66, 683.24 and 212.01 is: 317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.66 : 683.24 = 212.01 : x
  2. Step 2: Convert to fraction form
    455.66/683.24 = 212.01/x
  3. Step 3: Cross multiply
    455.66x = 683.24 × 212.01
  4. Step 4: Simplify right side
    455.66x = 144,849.24
  5. Step 5: Solve for x
    x = 144,849.24/455.66
  6. Step 6: Final answer
    x = 317.89

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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.