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Finding the Fourth Proportional to 404.46, 603.18 and 390.29

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Solution

The fourth proportional to 404.46, 603.18 and 390.29 is: 582.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    404.46 : 603.18 = 390.29 : x
  2. Step 2: Convert to fraction form
    404.46/603.18 = 390.29/x
  3. Step 3: Cross multiply
    404.46x = 603.18 × 390.29
  4. Step 4: Simplify right side
    404.46x = 235,412.11
  5. Step 5: Solve for x
    x = 235,412.11/404.46
  6. Step 6: Final answer
    x = 582.04

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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.