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Finding the Fourth Proportional to 405.20, 603.54 and 403.44

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Solution

The fourth proportional to 405.20, 603.54 and 403.44 is: 600.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.20 : 603.54 = 403.44 : x
  2. Step 2: Convert to fraction form
    405.20/603.54 = 403.44/x
  3. Step 3: Cross multiply
    405.20x = 603.54 × 403.44
  4. Step 4: Simplify right side
    405.20x = 243,492.18
  5. Step 5: Solve for x
    x = 243,492.18/405.20
  6. Step 6: Final answer
    x = 600.92

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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.