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Finding the Fourth Proportional to 613.32, 845.93 and 389.32

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Solution

The fourth proportional to 613.32, 845.93 and 389.32 is: 536.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.32 : 845.93 = 389.32 : x
  2. Step 2: Convert to fraction form
    613.32/845.93 = 389.32/x
  3. Step 3: Cross multiply
    613.32x = 845.93 × 389.32
  4. Step 4: Simplify right side
    613.32x = 329,337.47
  5. Step 5: Solve for x
    x = 329,337.47/613.32
  6. Step 6: Final answer
    x = 536.97

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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.