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Finding the Fourth Proportional to 455.05, 681.79 and 358.18

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Solution

The fourth proportional to 455.05, 681.79 and 358.18 is: 536.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    455.05 : 681.79 = 358.18 : x
  2. Step 2: Convert to fraction form
    455.05/681.79 = 358.18/x
  3. Step 3: Cross multiply
    455.05x = 681.79 × 358.18
  4. Step 4: Simplify right side
    455.05x = 244,198.34
  5. Step 5: Solve for x
    x = 244,198.34/455.05
  6. Step 6: Final answer
    x = 536.64

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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.