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Finding the Fourth Proportional to 613.47, 845.70 and 438.51

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Solution

The fourth proportional to 613.47, 845.70 and 438.51 is: 604.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.47 : 845.70 = 438.51 : x
  2. Step 2: Convert to fraction form
    613.47/845.70 = 438.51/x
  3. Step 3: Cross multiply
    613.47x = 845.70 × 438.51
  4. Step 4: Simplify right side
    613.47x = 370,847.91
  5. Step 5: Solve for x
    x = 370,847.91/613.47
  6. Step 6: Final answer
    x = 604.51

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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.