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Finding the Fourth Proportional to 405.35, 603.16 and 403.98

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Solution

The fourth proportional to 405.35, 603.16 and 403.98 is: 601.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.35 : 603.16 = 403.98 : x
  2. Step 2: Convert to fraction form
    405.35/603.16 = 403.98/x
  3. Step 3: Cross multiply
    405.35x = 603.16 × 403.98
  4. Step 4: Simplify right side
    405.35x = 243,662.56
  5. Step 5: Solve for x
    x = 243,662.56/405.35
  6. Step 6: Final answer
    x = 601.12

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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.