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Finding the Fourth Proportional to 890.62, 1,334.85 and 403.18

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Solution

The fourth proportional to 890.62, 1,334.85 and 403.18 is: 604.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.62 : 1,334.85 = 403.18 : x
  2. Step 2: Convert to fraction form
    890.62/1,334.85 = 403.18/x
  3. Step 3: Cross multiply
    890.62x = 1,334.85 × 403.18
  4. Step 4: Simplify right side
    890.62x = 538,184.82
  5. Step 5: Solve for x
    x = 538,184.82/890.62
  6. Step 6: Final answer
    x = 604.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.