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Finding the Fourth Proportional to 613.20, 846.36 and 403.66

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Solution

The fourth proportional to 613.20, 846.36 and 403.66 is: 557.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.20 : 846.36 = 403.66 : x
  2. Step 2: Convert to fraction form
    613.20/846.36 = 403.66/x
  3. Step 3: Cross multiply
    613.20x = 846.36 × 403.66
  4. Step 4: Simplify right side
    613.20x = 341,639.56
  5. Step 5: Solve for x
    x = 341,639.56/613.20
  6. Step 6: Final answer
    x = 557.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.