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Finding the Fourth Proportional to 358.04, 493.76 and 311.38

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Solution

The fourth proportional to 358.04, 493.76 and 311.38 is: 429.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.04 : 493.76 = 311.38 : x
  2. Step 2: Convert to fraction form
    358.04/493.76 = 311.38/x
  3. Step 3: Cross multiply
    358.04x = 493.76 × 311.38
  4. Step 4: Simplify right side
    358.04x = 153,746.99
  5. Step 5: Solve for x
    x = 153,746.99/358.04
  6. Step 6: Final answer
    x = 429.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.