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Finding the Fourth Proportional to 405.50, 604.98 and 354.06

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Solution

The fourth proportional to 405.50, 604.98 and 354.06 is: 528.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.50 : 604.98 = 354.06 : x
  2. Step 2: Convert to fraction form
    405.50/604.98 = 354.06/x
  3. Step 3: Cross multiply
    405.50x = 604.98 × 354.06
  4. Step 4: Simplify right side
    405.50x = 214,199.22
  5. Step 5: Solve for x
    x = 214,199.22/405.50
  6. Step 6: Final answer
    x = 528.24

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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.